1. Complex Noun Phrase in Natural Language Questions
Wentao Ding
Jiajie Yu
Linfeng Shi

2. Noun Phrase in
Internal relations in complex noun phrases were widely discussed.
In real utterances, a noun phrase behave as a/an …
Collection
Entity
Attribute
Meta/Abstract concept/predicate ……

3. Collection ≠ Class in KG-ontology
Darwin’s theory of evolution
An entity in KG.
A collection in utterance.

4. Conceptual entity & Attribute of a named entity
“big” is considered as a property of the concept “cottontail rabbit”
As a noun compound, we know “Obama” is a “President”.
In utterance, we only care about “the Obama”.
(Maybe just an Entity Annotation mistake)

5. Meta/Abstract concept/predicate
“amount” / “number” should not be treated as KG classes, since it is impossible to found appropriate instances for it.
Quantity
Is “Reasons” a factoid concept?

6. The first-step Task
Determine how a noun phrase behaves in natural questions (based on dep+entity annotations)
Method: CRF or Syntactic Rules
An entity mention will be considered as a single word, <Entity>/<Class> will be regard as a special pos-tag.

7. CoreNLP Dependency mistake
Check 30 utterances/file of OQA Dataset
Dataset
Error Rate
trec_train
2/30
trec_devtest
1/30
trec_test
webquestions_train
8/30
webquestions_devtest
webquestions_test
10/30
wikianswers_train
4/30
wikianswers_devtest
6/30
wikianswers_test
5/30
Maybe we should do some extra work to correct it.