3 Alignment with logical clues <cite>Tian et al. (2014)</cite> proposed a way to generate onthe-fly knowledge to fill knowledge gaps: if H is not proven, compare DCS trees of T and H to generate path alignments (e.g. blamed for death ∼ cause loss of life, as underscored in Figure 1) ; evaluate the path alignments by a similarity score function; and path alignments with a score greater than a threshold (0.4) are accepted and converted to inference rules.