In this task, you are given two sentences in the English language and your task is to classify them into one of their discourse types. A discourse type is an indicator to classify the given two sentences on the basis of a co-text as well as a relevant context. There are 13 discourse types in total which are 'SINGLE_S_COORD', 'SINGLE_CATAPHORA', 'SINGLE_CONN_INNER', 'SINGLE_APPOSITION', 'SINGLE_VP_COORD', 'SINGLE_CONN_START', 'PAIR_ANAPHORA', 'PAIR_CONN', 'SINGLE_RELATIVE', 'SINGLE_CONN_INNER_ANAPHORA', 'SINGLE_S_COORD_ANAPHORA', 'PAIR_CONN_ANAPHORA' and 'PAIR_NONE'.

Input: Consider Input: Sentence 1:One word of each pair is presented in a random order and the participant is asked to recall the item with which it was originally paired . Sentence 2:nan

Output: SINGLE_S_COORD_ANAPHORA


Input: Consider Input: Sentence 1:Its small userbase is advertised as a positive because it generally aids in the quick resolution of problems . Sentence 2:nan

Output: SINGLE_CONN_INNER


Input: Consider Input: Sentence 1:In the stories , the character briefly assumed the role of Captain America after the original -- Steve Rogers -- was presumed dead . Sentence 2:However , he was killed in action .


Output: PAIR_CONN_ANAPHORA