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'.
--------
Question: Sentence 1:Canal locks often attract spectators , including gongoozlers , because the operation of manual canal locks is a complex affair . Sentence 2:nan

Answer: SINGLE_CONN_INNER


Question: Sentence 1:Dobama Theatre is known for its annual Marilyn Bianchi Kids ' Playwriting Festival , open to Cuyahoga County students in grades 1 through 12 . Sentence 2:Dating back to 1979 it is the oldest children 's playwriting festival of its kind in the United States .

Answer: PAIR_ANAPHORA


Question: Sentence 1:The route availability code is RA8 , but freight trains above a certain size must not pass each other on the bridge . Sentence 2:nan

Answer:
SINGLE_S_COORD