As matt noted in the last class, there is an issue with agents and objects that needs to be examined. Agents and objects, once referred to, can be replaced by pronouns. These pronouns don't inherently code what they are referring to. In order to overcome this problem, the system must store the agents or objects in a special way.

From Rediscover Grammar by David Crystal:

Central Pronouns: express a definit, specific meaning...

• Personal Pronouns are the main means of identifying speakers addressees, and others: I, you, he, she, it, we, they.
  • First person: I, me, my, mine, myself, we, us, our(s), ourselves
  • Second person: you, your(s), yourself, yourselves
  • Third person: he, him, his, himself, she, her(s), herself, it, its, itself, one, one's, oneself, they, them, their(s), themselves
    • These are usually the subject, object, dative, or co agent in a stemma. In order to track these, could we have the parser keep a working memory of the what perspective the past few sentences' were in. The enunciation tree could be used to store this informaiton.  We need to use storage space, so keeping this extra information doesn't seem to be a problem on that level. We could enter in gender and count markers for what each of the pronouns is signifying, but that would only help a bit since each name does not really code gender on its own. We would have to tell the program the gender of every name in the language, which is not really an option.
    • In any case, there seems to have to be some mechanism in place that will track at least three stemma's at a time and know that information from the previous stemma is needed in order to figure out the current pronouns.
• Reflexive Pronouns always ending in -self or -selves, 'reflect' the meaning of a noun or pronoun elsewhere in the clause: myself, yourself, himself, herself, themselves, ourselves, itself, one's self,
• Possessive Pronouns express ownership, and appear in two forms. The first form appear as determiners: My your, his, her, their, our, its,   
  • Ex: my car, her bike
  • The second type are used on their own: Mine, yours, his, hers, ours, theirs, :
  • Ex: This is mine. Hers is on the table

     

Non-central Pronouns:

• Reciprocal pronouns are used to express a 'two-way' relationship: each other, one another.
  • Ex: They blamed each other. 
• Relative Pronouns are used to link a relative clause to the head of the noun phrase: who, whom, whose, which and that
• Interrogative Pronouns are used to ask questions about personal and nonpersonal nouns: who, whom, whose, which, what. They permit a contrast between definite and indefinite meaning:
  • What did you buy? (indefinite: an open choice)
  • Which did you buy? (definite: you chose from a small number of alternatives)
• Demonstrative Pronouns express a contrast between 'near' and 'distant:' this/theese, that/those.

Indefinite Pronouns: epress a less specific meaning; always to do with quantity.

• Compound pronouns:
  • everyone, everybody, everything, someone, somebody, something, anyone, anybody, anything, noone, nobody, nothing
• Of- Pronouns:
  • all of, both of, each of, much of, many of, more of, most of, a few/fewer/fewest of, a little/less/least of, some of, any of, one of, none of, neither of, few of, little of