While our semantic based approach naturally accounts for this by copying the phrase corresponding to the shared entity in both phrases, syntax based approach such as<cite> Zhu et al. (2010)</cite> and Woodsend and Lapata (2011) will often fail to appropriately reconstruct the shared phrase and introduce agreement mismatches because the alignment or rules they learn are based on syntax alone. For instance, in example (2),<cite> Zhu et al. (2010)</cite> fails to copy the shared argument "The judge" to the second clause whereas Woodsend and Lapata (2011) learns a synchronous rule matching (VP and VP) to (VP.