CS G224 Natural Language Processing
		       Spring 2006 -- Prof. Hafner
		       Assignment 5  -  Due Feb. 15


        Extended Lexicon Assignment in preparation for parsing

Part I. Revise your lexicon program 

Part Ia. New lexical categories and features
Change the lexical categories from Penn tags to the following:
Pronoun
ProperNoun
Noun
Aux
Modal
Verb
Adjective
Adverb
Preposition
Determiner
Conjunction
's or ' (possessive ending)

All other information about words is represented using features.

In your new lexicon, the structure of each definition in a lexical 
entry is as follows:
  	CAT - the part of speech
	BASE - base or "root" form of the word
	Features: an attribute-value list
		LEX = the word itself
		For nouns: NUMBER =  MASS, SG, PL
		For verbs: 
		  FORM = BASE PRES PAST PPRT ING 3PS
		  COMP = DOBJ IOBJ TO-VP THAT-S FOR-ING FOR-TO
		For pronouns determiners and adverbs: WH
		For pronouns: REFLexive, SUBjective, ACCusative, POSSessive
		For adjectives and adverbs: BASE, COMParative, SUPerlative
			
Part Ib. Vocabulary
Below are some sentences we will attempt to parse, along with a variety
of grammatical transformations (such as changing declarative sentences to
question form, changing number and tense, and interchanging different
forms of noun phrases).

The words in these sentences should be included in your lexicon, along
with the base forms of any words which are not themselves base forms.

Remember: we are NOT using Penn tags as our lexical categories any more.

Snakes bite.
Harry received a warning.
He looked at the grandfather clock.
Hermione left the hospital wing in February.
They took their usual places in Lockhart's classroom.
He saw three very large owls flutter across the sky.
Every statue's shadow looked like Filch.
The delicious smell of baking pumpkin wafting through the corridors
   woke them.
Hagrid asked the man who sat behind the counter for a supply of some 
   basic potion ingredients for Harry.
Ron and Hermione dropped their trowels and hurried to the edge of the forest.
Harry knows the answer.
Harry received chocolate frogs for Christmas.
This robe belonged to your father.
That wand can turn blood into water.
Ron wanted to skip Herbology.
Hermione started making study schedules for Harry and Ron.
Harry noticed that they were straining to escape the straps holding them 
   inside the box	
All the three first many very large dragons.

Part II. (Not to hand in).  Review the syntactic structures of
English we learned in Week 4, by quizzing yourself on the sentences
above, all of which were used to illustrate various grammatical concepts.