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:Wayne Barrett ( July 11 , 1945 -- January 19 , 2017 ) was an American journalist . Sentence 2:He was an investigative reporter and senior editor for The Village Voice for 37 years .
[A]: PAIR_ANAPHORA


[Q]: Sentence 1:The sixth stage was originally scheduled to be 265 km ( 165 mi ) in length , but it was shortened the day before it was to be run . Sentence 2:nan
[A]: SINGLE_S_COORD_ANAPHORA


[Q]: Sentence 1:This may be a more efficient use of biomass than conventional biofuel because it uses most of the carbon and chemical energy from the biomass instead of releasing as much energy and carbon . Sentence 2:nan
[A]:
SINGLE_CONN_INNER_ANAPHORA