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'.

Example Input: Sentence 1:He is a recipient of a Bay Area Critics Circle award and is a writer in residence with the LA Writer 's Center . Sentence 2:nan
Example Output: SINGLE_S_COORD

Example Input: Sentence 1:This includes sole credit on an episode of Palmerstown USA ( 1980 ) , a CBS series by Alex Haley and Norman Lear , as well as work on The Lazarus Syndrome ( 1978 ) and Freedom Road ( 1979 ) . Sentence 2:nan
Example Output: SINGLE_APPOSITION

Example Input: Sentence 1:However , it has committed itself to develop it into a full - fledged Institute with multi-dimensional academic research in health , education and cultural activities . Sentence 2:Therefore , classes for MA are being planned , besides teaching pure science .
Example Output:
PAIR_CONN