To be more concrete, the best system with word embeddings (row 12 in Table 2 ) significantly outperforms the best system in<cite> Plank and Moschitti (2013)</cite> with p < 0.05, an improvement of 3.7%, 1.1% and 2.7% on the target domains bc, cts and wl respectively, demonstrating the benefit of word embeddings for DA of RE in the tree kernel-based method.