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Table 8: 
Features used for linear classifier.
TypeFeature Description
Labels 
Anchor & head lemma 
2 sized window lemmas 
2 sized window POS tags 
Dependency edge of target 
Head POS tag 
Head lemma 
Left most child lemma of anchor head 
Children of syntactic head 
 
Structure 
Question mark before or after the anchor 
Sentence length bin ( <5 < 10 <) 
Span length bin (1, 2 or more) 
Hyphen in anchor span 
Apostrophe before or after the span 
Slash in anchor span 
Apostrophe + ’s’ after span 
Anchor is ending the sentence 
 
Match 
Whether the text contains a currency expression 
Whether the text contains a time expression 
Entity exists in the sentence before the target 
 
Other 
Target size bin ( <1 < 10 < 100 < 1600 < 2100 <) 
The number shape (digit or written text) 
TypeFeature Description
Labels 
Anchor & head lemma 
2 sized window lemmas 
2 sized window POS tags 
Dependency edge of target 
Head POS tag 
Head lemma 
Left most child lemma of anchor head 
Children of syntactic head 
 
Structure 
Question mark before or after the anchor 
Sentence length bin ( <5 < 10 <) 
Span length bin (1, 2 or more) 
Hyphen in anchor span 
Apostrophe before or after the span 
Slash in anchor span 
Apostrophe + ’s’ after span 
Anchor is ending the sentence 
 
Match 
Whether the text contains a currency expression 
Whether the text contains a time expression 
Entity exists in the sentence before the target 
 
Other 
Target size bin ( <1 < 10 < 100 < 1600 < 2100 <) 
The number shape (digit or written text) 
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