1
Ambiguity resolution in parsing means
Correct Answer
choosing the most likely parse among many possible parses
☑ MCQ PRACTICE
Natural Language Processing Unit 3
Practice objective questions for quick revision and examination preparation. Try answering each question before revealing the answer.
Natural Language Processing - Unit-3
2
A PCFG resolves ambiguity by
Correct Answer
selecting the parse with the highest probability
3
A lexicalized PCFG
Correct Answer
annotates non-terminals with their head words
4
Parse reranking means that
Correct Answer
a second model reorders the n-best parses produced by a first parser
5
Discriminative parsing models
Correct Answer
learn from features to separate correct parses from incorrect ones
6
A major challenge of parsing morphologically rich languages is
Correct Answer
data sparsity because of the large number of word forms
7
Which of the following is a treebank for Czech?
Correct Answer
Prague Dependency Treebank
8
Languages with free word order are hard for parsers based mainly on
Correct Answer
fixed constituent order
9
Semantic parsing is the task of
Correct Answer
mapping natural language text to a formal meaning representation
10
Semantic interpretation includes tasks such as
Correct Answer
word sense disambiguation, entity resolution and predicate-argument analysis
11
Word sense disambiguation (WSD) is
Correct Answer
determining which sense of a word is used in a given context
12
WordNet is
Correct Answer
a lexical database in which words are grouped into synsets
13
A synset is
Correct Answer
a set of synonyms that share a meaning
14
The Lesk algorithm disambiguates a word by
Correct Answer
measuring the overlap between dictionary definitions and the context
15
Supervised WSD requires
Correct Answer
sense-annotated training data
16
Polysemy means that a word
Correct Answer
has several related senses
17
Homonyms are words that
Correct Answer
have the same form but unrelated meanings
18
A hypernym is
Correct Answer
a more general term, such as 'animal' for 'dog'
19
A hyponym is
Correct Answer
a more specific term, such as 'dog' for 'animal'
20
Rule-based semantic parsing systems depend on
Correct Answer
hand-written rules
21
Unsupervised WSD typically works by
Correct Answer
clustering the contexts in which a word occurs
22
SemCor is
Correct Answer
a corpus in which words are tagged with WordNet senses
23
Recognising that 'Obama' and 'he' refer to the same person is called
Correct Answer
coreference resolution
24
Semi-supervised systems use
Correct Answer
a small amount of labelled data together with a large amount of unlabelled data
25
Multilingual parsing is difficult because languages differ in
Correct Answer
word order and morphology
Fill in the Blanks
26
WSD stands for Word __________ Disambiguation.
Correct Answer
Sense
27
__________ is a lexical database of English organised into synsets.
Correct Answer
WordNet
28
A set of synonyms that share a meaning is called a __________.
Correct Answer
synset
29
The __________ algorithm disambiguates a word using the overlap between definitions and context.
Correct Answer
Lesk
30
A word that has several related senses shows __________.
Correct Answer
polysemy
31
A hypernym is a more __________ term than its hyponym.
Correct Answer
general
32
A hyponym is a more __________ term than its hypernym.
Correct Answer
specific
33
A PCFG resolves ambiguity by choosing the parse with the highest __________.
Correct Answer
probability
34
A lexicalized PCFG annotates non-terminals with __________ words.
Correct Answer
head
35
Parse __________ reorders the n-best parses produced by a first parser.
Correct Answer
reranking
36
The Prague Dependency Treebank is a treebank for the __________ language.
Correct Answer
Czech
37
Semantic __________ maps natural language text to a formal meaning representation.
Correct Answer
parsing
38
__________ resolution links expressions that refer to the same entity.
Correct Answer
Coreference
39
Languages with many word forms suffer from data __________.
Correct Answer
sparsity
40
WSD that uses no sense-labelled data is called __________ WSD.
Correct Answer
unsupervised