Difference between revisions of "Lingala and Kikuyu/Structural Transfer"

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==Implementation==
 
==Implementation==
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===lin → kik===
 +
 +
===kik → lin===
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We implemented two rules in the Kikuyu to Lingala translation direction, one of which fixes a number of contrasts between the two languages. The first and simplest dealt with our [[Lingala and Kikuyu/Contrastive Grammar|first contrastive grammar point]], which states that a locative tag on a noun in Kikuyu is realized as a preposition preceding the noun in the Lingala. The sentence used in our contrastive grammar can be used to illustrate the rule: {{transferTest|kik|lin|kĩambĩrĩriainĩ|na ebandeli}}. The output is as follows:
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*Tagger: <code>^ambĩrĩria<n><cl7><sg><loc>$^.<sent>$</code>
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*Biltrans: <code>^ambĩrĩria<n><cl7><sg><loc>/ebandeli<n><cl7><sg><loc>$^.<sent>/.<sent>$</code>
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*Chunker: <code>^noun_locative<loc>{^na<pr>$ ^ebandeli<n><cl7><sg>$}$^sent<SENT>{^.<sent>$}$</code>
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*Interchunk: <code>^noun_locative<loc>{^na<pr>$ ^ebandeli<n><cl7><sg>$}$^sent<SENT>{^.<sent>$}$</code>
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*Postchunk: <code>^na<pr>$ ^ebandeli<n><cl7><sg>$^.<sent>$</code>
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*Complete translation: <code>na ebandeli</code>
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 +
The other rule we implemented was a basic verb transfer rule. It works by mapping Kikuyu tenses to Lingala tenses, removing extraneous Kikuyu tags not used in Lingala, and adding the negative particle "te" at the end of a sentence for Kikuyu verbs that are tagged as negative. It also adds a default animacy tag to the Lingala verb. The sentence used in our second contrastive grammar point can be used to illustrate the rule: {{transferTest|kik|lin|ti wega|ezalí malámu te}}
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*Tagger: <code>^rĩ<cop><pres><neg><p3><cl5><sg>$ ^ega<adj>$^.<sent>$</code>
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*Biltrans: <code>^rĩ<cop><pres><neg><p3><cl5><sg>/kozala<v><pres><neg><p3><cl5><sg>$ ^ega<adj>/malámu<adj>$^.<sent>/.<sent>$</code>
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*Chunker: <code>^verb<verb>{^kozala<v><pres><p3><sp><nn>$}$ ^default<default>{^malámu<adj>$}$^negative<neg>{ ^te<neg>$}$^sent<SENT>{^.<sent>$}$</code>
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*Interchunk: <code>^verb<verb>{^kozala<v><pres><p3><sp><nn>$}$ ^default<default>{^malámu<adj>$}$^negative<neg>{ ^te<neg>$}$^sent<SENT>{^.<sent>$}$</code>
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*Postchunk: <code>^kozala<v><pres><p3><sp><nn>$ ^malámu<adj>$ ^te<neg>$^.<sent>$</code>
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*Complete translation: <code>ezalí malámu te</code>
  
 
==Post-Evalatuion==
 
==Post-Evalatuion==

Revision as of 16:02, 6 April 2017

This page details transfer rules for translation between Lingala and Kikuyu

Pre-Evaluation

Below are the evaluation statistics for both the mini test corpus and the full parallel corpus:

lin → kik evaluation

Evaluation of mini corpus:

  • WER: 87.50%
  • PER: 87.50%
  • Percentage unknown words: 0.0%
  • Percentage known words: 100%

Evaluation of full corpus:

  • WER: 99.06%
  • PER: 94.34% (unknown-word marks removed)
  • Percentage unknown words: 66.67%
  • Percentage known words: 33.33%

kik → lin evaluation

Evaluation of mini corpus:

  • WER: 80.00%
  • PER: 80.00%
  • Percentage of unknown words: 0.0%
  • Percents of known words: 100%

Evaluation of full corpus:

  • WER: 98.13%
  • PER: 90.65% (unknown-word marks remove)
  • Percentage of unknown words: 70.75%
  • Percentage of known words: 29.25%

Implementation

lin → kik

kik → lin

We implemented two rules in the Kikuyu to Lingala translation direction, one of which fixes a number of contrasts between the two languages. The first and simplest dealt with our first contrastive grammar point, which states that a locative tag on a noun in Kikuyu is realized as a preposition preceding the noun in the Lingala. The sentence used in our contrastive grammar can be used to illustrate the rule: (kik) kĩambĩrĩriainĩ → (lin) na ebandeli. The output is as follows:

  • Tagger: ^ambĩrĩria<n><cl7><sg><loc>$^.<sent>$
  • Biltrans: ^ambĩrĩria<n><cl7><sg><loc>/ebandeli<n><cl7><sg><loc>$^.<sent>/.<sent>$
  • Chunker: ^noun_locative<loc>{^na<pr>$ ^ebandeli<n><cl7><sg>$}$^sent<SENT>{^.<sent>$}$
  • Interchunk: ^noun_locative<loc>{^na<pr>$ ^ebandeli<n><cl7><sg>$}$^sent<SENT>{^.<sent>$}$
  • Postchunk: ^na<pr>$ ^ebandeli<n><cl7><sg>$^.<sent>$
  • Complete translation: na ebandeli

The other rule we implemented was a basic verb transfer rule. It works by mapping Kikuyu tenses to Lingala tenses, removing extraneous Kikuyu tags not used in Lingala, and adding the negative particle "te" at the end of a sentence for Kikuyu verbs that are tagged as negative. It also adds a default animacy tag to the Lingala verb. The sentence used in our second contrastive grammar point can be used to illustrate the rule: (kik) ti wega → (lin) ezalí malámu te

  • Tagger: ^rĩ<cop><pres><neg><p3><cl5><sg>$ ^ega<adj>$^.<sent>$
  • Biltrans: ^rĩ<cop><pres><neg><p3><cl5><sg>/kozala<v><pres><neg><p3><cl5><sg>$ ^ega<adj>/malámu<adj>$^.<sent>/.<sent>$
  • Chunker: ^verb<verb>{^kozala<v><pres><p3><sp><nn>$}$ ^default<default>{^malámu<adj>$}$^negative<neg>{ ^te<neg>$}$^sent<SENT>{^.<sent>$}$
  • Interchunk: ^verb<verb>{^kozala<v><pres><p3><sp><nn>$}$ ^default<default>{^malámu<adj>$}$^negative<neg>{ ^te<neg>$}$^sent<SENT>{^.<sent>$}$
  • Postchunk: ^kozala<v><pres><p3><sp><nn>$ ^malámu<adj>$ ^te<neg>$^.<sent>$
  • Complete translation: ezalí malámu te

Post-Evalatuion

lin → kik evaluation

Evaluation of mini corpus:

  • WER: ?
  • PER: ?
  • Percentage unknown words: ?
  • Percentage known words: ?

Evaluation of full corpus:

  • WER: ?
  • PER: ? (unknown-word marks removed)
  • Percentage unknown words: ?
  • Percentage known words: ?

kik → lin evaluation

Evaluation of mini corpus:

  • WER: ?
  • PER: ?
  • Percentage of unknown words: ?
  • Percents of known words: ?

Evaluation of full corpus:

  • WER: ?
  • PER: ? (unknown-word marks remove)
  • Percentage of unknown words: ?
  • Percentage of known words: ?
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