Boundaries Coarse Filter: This sub-component is based on a Maximum Likelihood probabilistic model that given a sentence, selects the 10 sub-sentences whose boundaries most probably correspond to a CDC.
given a sentence, for each of its sub-sentences 1 we consider the token preceding it; the token with which it starts; the token with which it ends; and the token following it, where a token here can be a word or a punctuation mark.