In addition, since we can safely assume that "perfect alignments" yield good translations, the remaining parts of the sentences they appear on are likely to be translations of each other as well [3].
each "perfect alignment" yields up to two multilingual alignments per line: 1. the sequence of words that consists of the "perfect alignment" itself, preserving word order from the sentence; 2. the complementary of this sequence on the line (i.e., its context), ordered as well.