Syntactic Parsing - Phrase Structures Flashcards
1
Q
Can all parsers do phrase structure?
A
No
2
Q
What do phrase structure trees show?
A
Groupings of words into phrases
hierarchical structure of phrases
3
Q
What types of phrase are there
A
NP noun phrase VP verb phrase PP prepositional phrase AdjP adjectival phrase AdvP adverbial phrase
4
Q
What is a context free grammar, in this context?
A
A parse performs phrase structure analysis using a bank of grammar production rules
5
Q
S ->
A
NP VP
6
Q
NP ->
A
NN PRP DT NN JJ NN NP PP
7
Q
VP ->
A
VBD
VP NP
VP PP
8
Q
PP ->
A
IN NP
9
Q
In what scenario are there multiple versions of the tree?
A
The sentence is syntactically ambiguous
10
Q
Dependence vs phrase structures
A
dependency
- directed edges
- edge labels
- POS tags
phrase structures
- non terminal nodes are phrases
- POS tags
11
Q
What can we use the results of parsing for?
A
Relationship Extraction
Information Extraction
