Week 4 - POS Tagging

Question 1

POS

Answer 1

Parts of Speech

A linguistic category of words, which is generally defined by their syntactic or morphological behaviour

Word class, lexical class & lexical category refer to the same thing

Explains not what the word is, but how it is used

Question 2

Typical grammar classifications

Answer 2

verb - Open
noun - Open
adjective - Open
adverb - Open
interjection -Open
pronoun - Closed
preposition - Closed
conjunction - Closed

Question 3

Open Word classes

Answer 3

Classes that constantly acquire new words
nouns: Internet, Blog, Covid
verbs: To google, To tweet, To self-isolate

Question 4

Closed word classes

Answer 4

Classes that generally do not acquire new members
prepositions: to, from, in
pronouns: I, you, he/she/it, we, them

Question 5

Content Words

Answer 5

Words that carry the meaning of a sentence

Question 6

Function words (grammatical words)

Answer 6

Words that have little lexical meaning, but instead serve to express grammatical relationships with other words within a sentence or the speaker’s mood

Articles (the) or conjunctions (and) can be found in almost any utterance, no matter what they are about

Question 7

POS Tagging

Answer 7

assigning a part of speech to each word in a corpus

Question 8

Main issue with POS tagging

Answer 8

Same word (form) can have different POS tags depending on the context

Question 9

Internal cues for POS tagging

Answer 9

morphology (on particular affixes) can be used to guess POS of unknown words

bootylicious -> -ous is (often) used for adjectives

ODed -> -ed is common for verbs (past)

Question 10

External cues for POS tagging

Answer 10

POS tags are predicted using (limited amount of) context

It’s more likely to see a verb after token “will”