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Presentation transcript:

All sections to appear here Identification of the Question Focus: Combining Syntactic Analysis and Ontology-based Lookup through the User Interaction All sections to appear here Danica Damljanović, Milan Agatonović, Hamish Cunningham email: danica@dcs.shef.ac.uk

Question Answering Question category traditional approach documents Question category usually identified based on the syntax Answer type identifies the type of the answer Focus: the part of the question which retrieves what the user is interested in Example: Who works for IBM? category: Who, answer type: Person, focus: IBM our approach ontologies 5/26/2019 LREC 2010

2 1 3 5/26/2019 LREC 2010

1 5/26/2019 LREC 2010

Focus Answer Type Identifier Question 5/26/2019 LREC 2010

Finding focus 5/26/2019 LREC 2010

2 5/26/2019 LREC 2010

Ontology-based annotations OntoRootGaz PR from GATE (http://gate.ac.uk ), part of Gazetteer_Ontology_Based plugin 5/26/2019 LREC 2010

3 5/26/2019 LREC 2010

Consolidation 5/26/2019 LREC 2010

Answer Type Identifier found? Means we need to engage the user into the dialog in order to identify the answer type 5/26/2019 LREC 2010

No Answer Type Identifier (WH-phrases) Found? Often means we could derive the answer type without engaging the user 5/26/2019 LREC 2010

FREyA: a Natural Language Interface to Ontologies http://gate.ac.uk/freya 5/26/2019 LREC 2010

FREyA: a Natural Language Interface to Ontologies http://gate.ac.uk/freya 5/26/2019 LREC 2010

Evaluation Subset of the Mooney GeoQuery dataset: 250 questions we have manually labelled the focus/ATI/answer type for each question and then measured correctness of identifying the focus/Answer Type Identifier (no ontology-based lookup involved) correctness of consolidation algorithm: whether the Answer Type was identified correctly 5/26/2019 LREC 2010

Identification of the question focus 5/26/2019 LREC 2010

Identification of the Answer Type Identifier (WH-phrases) 5/26/2019 LREC 2010

Consolidation 5/26/2019 LREC 2010

All sections to appear here Questions? All sections to appear here Danica Damljanović, Milan Agatonović, Hamish Cunningham email: danica@dcs.shef.ac.uk 5/26/2019 LREC 2010