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Link to Git repository: https://github.swarthmore.edu/Ling073-sp22/ling073-mto

Initial evaluation of ambiguity

Using the script shown in the Calculating ambiguity section of the Morphological Disambiguator wiki page, the initial level of ambiguity in our corpus is about 1.025.

EDIT: After determining that juuꞌ is only a relativizer, not a demonstrative, corpus ambiguity is apparently 1.

forms in transducer: 204288

unique forms in transducer:106575

  • The reason there are so many is because it's outputting all possible spelling variations for each token. I'm not sure how to prevent this.

Ambiguous terms


Verb stem pö’ö "break" and noun pö’ö "sand"


I had to make up a sentence because (1) I couldn't find any example sentences with this word and, (2) I had trouble finding any other cases of ambiguity.

I started with an example sentence that includes a verb from the same non-agentive ambitransitive verb paradigm as pö’ö.

  • xi nëëj ’ixtaamp
    xii nëëj ø=’ëjx-tam-p
    that water 3S.IND=BASE-spill-IDT.ICPL.INTR
    "That water spilled." (p75 of 312)

First, I switched out nëëj "wind" with pu'u "board/table", to try and make the sentence semantically sound. Then, I replaced independent incompletive aspect with independent completive aspect, thus changing the aspect suffix from -p to . Finally, I switched the verb stem to pö’ö. This gets us, to the best of my knowledge:

  • xi pu'u pö’ö
    xii pu'u ø=pö’ö-ø
    that board 3S.IND=break-IDT.CPL.INTR
    that board broke

The main thing I'm unclear on is whether the verb stem would take a different form. Some verb stems change more than others depending on aspect, transitivity, dependency, and construction type (direct, inverse). I haven't seen any clear pattern that would allow me to predict what shape pö’ö takes when it is an independent, completive, intransitive verb.

Transducer analysis for this sentence:

^xi/xii<det><dem>$ ^pu'u/pu'u<n><sg>$ ^pö’ö/pö’ö<v><idt><cpl><p3>/pö’ö<v><dep><cpl><p3>/pö’ö<v><dep><cpl><p1>/pö’ö<v><dep><icpl><p1>/pö’ö<v><dep><icpl><p3>/pö’ö<v><idt><cpl><p1>/pö’ö<n>$^./.<sent>$


  • kumöön pöꞌö yäkpätsïmjä
    kumöön pö’ö y=yäk-pä’äv-tsëm-jäy-I
    town sand 3S.DEP=PAS-EDGE-load-APL.R-ICPL.DEP
    "The sand is carried to the municipality."

Note that I'm treating pä’äv-tsëm as a verb stem pätsïm, since pä’äv is a lexical prefix.

Transducer analysis for this sentence:

^kumöön/kumöön<n><sg>$ ^pöꞌö/pöꞌö<n>/pöꞌö<v><idt><cpl><p3>$ ^yäkpätsïmjä/yäkpä’ävtsëm<v><tv><dep><icpl><pas><apl><p3>$^./.<sent>$


If there is another verb in the sentence, pöꞌö is likely a noun. If there is no other verb in the sentence, pöꞌö is almost certainly a verb.

Final evaluation of ambiguity

Our corpus's level of ambiguity hasn't changed, since it was 1 and continues to be 1. I do think, though, that if we were to implement all possible verb affixes and add all the verb stems from our corpus, we would have a little ambiguity, at least.