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Table 1 

Features used in our intra- and multi-sentential parsing models.

8 Organizational featuresIntra & Multi-Sentential
Number of EDUs in unit 1 (or unit 2). 
Number of tokens in unit 1 (or unit 2). 
Distance of unit 1 in EDUs to the beginning (or to the end). 
Distance of unit 2 in EDUs to the beginning (or to the end). 
4 Text structural features Multi-Sentential 
Number of sentences in unit 1 (or unit 2). 
Number of paragraphs in unit 1 (or unit 2). 
8 N-gram featuresN∈{1, 2, 3} Intra & Multi-Sentential 
Beginning (or end) lexical N-grams in unit 1. 
Beginning (or end) lexical N-grams in unit 2. 
Beginning (or end) POS N-grams in unit 1. 
Beginning (or end) POS N-grams in unit 2. 
5 Dominance set features Intra-Sentential 
Syntactic labels of the head node and the attachment node. 
Lexical heads of the head node and the attachment node. 
Dominance relationship between the two units. 
9 Lexical chain features Multi-Sentential 
Number of chains spanning unit 1 and unit 2. 
Number of chains start in unit 1 and end in unit 2. 
Number of chains start (or end) in unit 1 (or in unit 2). 
Number of chains skipping both unit 1 and unit 2. 
Number of chains skipping unit 1 (or unit 2). 
2 Contextual features Intra & Multi-Sentential 
Previous and next feature vectors. 
2 Sub-structural features Intra & Multi-Sentential 
Root nodes of the left and right rhetorical sub-trees. 
8 Organizational featuresIntra & Multi-Sentential
Number of EDUs in unit 1 (or unit 2). 
Number of tokens in unit 1 (or unit 2). 
Distance of unit 1 in EDUs to the beginning (or to the end). 
Distance of unit 2 in EDUs to the beginning (or to the end). 
4 Text structural features Multi-Sentential 
Number of sentences in unit 1 (or unit 2). 
Number of paragraphs in unit 1 (or unit 2). 
8 N-gram featuresN∈{1, 2, 3} Intra & Multi-Sentential 
Beginning (or end) lexical N-grams in unit 1. 
Beginning (or end) lexical N-grams in unit 2. 
Beginning (or end) POS N-grams in unit 1. 
Beginning (or end) POS N-grams in unit 2. 
5 Dominance set features Intra-Sentential 
Syntactic labels of the head node and the attachment node. 
Lexical heads of the head node and the attachment node. 
Dominance relationship between the two units. 
9 Lexical chain features Multi-Sentential 
Number of chains spanning unit 1 and unit 2. 
Number of chains start in unit 1 and end in unit 2. 
Number of chains start (or end) in unit 1 (or in unit 2). 
Number of chains skipping both unit 1 and unit 2. 
Number of chains skipping unit 1 (or unit 2). 
2 Contextual features Intra & Multi-Sentential 
Previous and next feature vectors. 
2 Sub-structural features Intra & Multi-Sentential 
Root nodes of the left and right rhetorical sub-trees. 
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