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'.

[Q]: Sentence 1:Although most of his work went unpublished , Taylor was the first psychologist known to use exposure therapy treatment for anxiety , including methods of situational exposure with response prevention -- a common exposure therapy technique still being used . Sentence 2:nan
[A]: SINGLE_CONN_START


[Q]: Sentence 1:The central spire rises to a height of 201 feet ( 61 m ) , and the tower on which it stands is square in shape and was patterned on the lines of the 12th - century Canterbury Cathedral , England . Sentence 2:nan
[A]: SINGLE_S_COORD_ANAPHORA


[Q]: Sentence 1:Attorney Pablo Oro , who had been one of the leaders in urging this move and in seeking patrons to help develop the law library , was given the responsibility for developing the program . Sentence 2:nan
[A]:
SINGLE_RELATIVE