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Human Language Technology for the Semantic Web
Published on Feb 25, 20074965 Views
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Chapter list
Metadata Extraction: Human Language Technology and the Semantic Web http://gate.ac.uk/ http://nlp.shef.ac.uk/ Hamish Cunningham Kalina Bontcheva Valentin Tablan Diana Maynard SEKT meeting,00:02
The Knowledge Economy and Human Language00:56
HLT and Knowledge: Closing the Language Loop02:02
Structure of the Tutorial 03:27
Information Extraction04:34
MUC-7 tasks09:18
An Example09:56
Performance levels12:04
What are Named Entities?17:20
What are Named Entities (2)18:39
Basic Problems in NE18:51
More complex problems in NE19:48
Corpora and System Development21:08
Some NE Annotated Corpora21:45
The MUC-7 corpus23:23
The MUC-7 Corpus (2)24:12
ACE – Towards Semantic Tagging of Entities25:41
ACE Entities27:01
ACE Example27:05
Annotation Tools: Alembic, GATE, ...27:08
Performance Evaluation27:56
The Evaluation Metric (2)28:20
The GATE Evaluation Tool30:25
Corpus-level Regression Testing32:13
Regression Testing (2)32:40
Challenge: Evaluating Richer NE Tagging32:52
SW IE Evaluation tasks34:08
Structure of the Tutorial 40:41
Two kinds of IE approaches40:58