import tensorflow as tf

                                passage_word_idx, passage_mask, v, w_c, word_vocab)
            vocab_scores = tf.log(output_t)
            greedy_prediction = tf.reshape(tf.argmax(output_t, 1),[-1]) # calcualte greedy
            multinomial_prediction = tf.reshape(tf.multinomial(vocab_scores, 1),[-1]) # calculate multinomial
