We use a similar archi- Table 2 : Quantitative evaluation of existing baselines from previous work and seq2seq with prior attention from the CVAE when choosing an optimal z sample for BLEU scores. tecture as Zhu et al. (2010) and<cite> Nisioi et al. (2017)</cite> : 2 layers of stacked unidirectional LSTMs with bi-linear global attention as proposed by Luong et al. (2015) , with hidden states of 512 dimensions.