We briefly discuss our previously proposed <cite>relaxed hybrid tree</cite> model <cite>(Lu, 2014)</cite> in this section. <cite>The model</cite> is a discriminative semantic parsing model which extends the generative hybrid tree model (Lu et al., 2008) . Let us use m to denote a complete semantic representation, n to denote a complete natural language sentence, and h to denote a complete latent structure that jointly represents both m and n. <cite>The model</cite> defines the conditional probability for observing a (m, h) pair for a given natural language sentence n using a log-linear approach: