Clustering by lemma: all dependency trees having the same lemma as predicate are put together if the number of such trees is at least a 2 Remark: unless stated otherwise, we will use terms "lemma", "POS tag" "dependency relation" or "head" to refer to the information contained in the corresponding "P-columns" for each word.
in order to keep the system as generic as possible, features are generated automatically and only a few parameters may vary.