import tensorflow as tf

        if self.demo:
            self.c = tf.placeholder(tf.int32, [None, self.config.max_p_len], "context")
            self.q = tf.placeholder(tf.int32, [None, self.config.max_q_len], "question")
            self.ch = tf.placeholder(tf.int32, [None, self.config.max_p_len, self.config.max_ch_len], "context_char")
