import tensorflow as tf

                self.char_mat, self.qh), [N * QL, CL, dc])
            ch_emb = tf.nn.dropout(ch_emb, 1.0 - 0.5 * self.dropout)
            qh_emb = tf.nn.dropout(qh_emb, 1.0 - 0.5 * self.dropout)

