import tensorflow as tf

            if self.demo:
                self.c = tf.placeholder(tf.int32, [None, config.test_para_limit],"context")
                self.q = tf.placeholder(tf.int32, [None, config.test_ques_limit],"question")
                self.ch = tf.placeholder(tf.int32, [None, config.test_para_limit, config.char_limit],"context_char")
