Semantic Information Extraction: Overview and Basic Techniques

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̵ ̵ ̵ ̵ DS Implementation • Step-1: Define context Syntactic context, lexical context… • Step-2: Represent each term by a feature vector Feature: A context in which the term appears Feature value: “Weight” of the context w.r.t. the term • Step3: Compute term similarity Term similarity = similarity between corresponding feature vectors
DS Implementation DS approaches implemented in the study Pointwise mutual information: Sentence: …w 1 w 2 w 3 w w 4 w 5 w 6 … Sentence: This is an interesting read for anyone studying logic Context of “w”: Context of “logic”: “w 2 w 3 w 4 w 5 ” (size: 4) “study F(w, V:obj:N” c): Frequency of context c occurring for term w or “w 3 w 4 ” (size: 2)
Page 1 and 2: Semantic Information Extraction: Ov
Page 3 and 4: ̵ ̵ ̵ ̵ ̵ Information Extracti
Page 5 and 6: ̵ ̵ Semantic Information Extracti
Page 7 and 8: IE Task: Named Entity Extraction
Page 9 and 10: IE Task: Relation & Event Extractio
Page 11 and 12: ̵ ̵ ̵ ̵ Semantic Class Mining
Page 13 and 14: ̵ PB Implementation • RASC minin
Page 15: ̵ ̵ ̵ ̵ ̵ ̵ ̵ ̵ Distributio
Page 19 and 20: Compare and Combine PB & DS (cont.)
Page 21 and 22: Samples (Query: Apple) PB results D
Page 23 and 24: Related Papers • Harris, 1985 (in
Page 25 and 26: Semantic Hierarchy Construction
Page 27 and 28: Subtask: TermLabel • Approach: Pa
Page 29 and 30: ̵ ̵ Subtask: TermLabel (cont.)
Page 31 and 32: Related Papers • Hearst, COLING
Page 33 and 34: Semantic Attributes Attr2 Attr3 Att
Page 35 and 36: ̵ ̵ ̵ ̵ ̵ ̵ Attribute Name Ex
Page 37 and 38: Table Mining References • G. Lima
Page 39 and 40: ̵ ̵ General Relations • Relatio
Page 41 and 42: ̵ ̵ ̵ ̵ Supervised Learning •
Page 43 and 44: ̵ ̵ ̵ ̵ Kernel based Methods
Page 45 and 46: ̵ ̵ Tree Kernel for RDC • Convo
Page 47 and 48: ̵ ̵ Semi-Supervised Learning •
Page 49 and 50: Weakly Supervision • Handful of s
Page 51 and 52: Unsupervised Learning • Automatic
Page 53 and 54: References for General Relation Min
Page 55 and 56: Demo • “Find needles in a hayst

Semantic Information Extraction: Overview and Basic Techniques

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