29. Automatic Detection of Japanese Compound
Functional Expressions and its Application
to Statistical Dependency Analysis
•Japanese has many compound functional
expressions.
•One words include both content words and
functional words.
•e.g.
Ø“にあたって” and “をめぐって”
30. Ambiguity
• One compound expression have both
ØA literal content word usage
u私は、彼の車について走った。
uI drove following his car.
ØA non-literal functional usage
u私は、自分の夢について話した。
uI talked about my dream.
• To identify compound functional expression is
important for some NLP tasks.
• They use SVM for identifying expressions.
31. Approach
• They formalize the task as a chunking problem.
Ø“に あたっ て”→”にあたって”
• After chunking, results are used for dependency
analysis.
32. Results
•F93%, to identify functional expression
•Proposed dependency analysis with chunking
significantly outperform exiting tools.