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'.

[EX Q]: Sentence 1:On July 16 , 1925 , Mehaffey was appointed assistant to the executive officer of the Arlington Memorial Bridge Commission , an independent agency of the U.S. federal government established by Congress . Sentence 2:In that capacity , he helped oversee the design and early construction of the bridge .
[EX A]: PAIR_ANAPHORA

[EX Q]: Sentence 1:Admitting that Owen was innocent , they laid the crime on him . Sentence 2:nan
[EX A]: SINGLE_CATAPHORA

[EX Q]: Sentence 1:The Bamana people inherited much from their close relations , the Mandinka , in civic and military culture . Sentence 2:They formed their own empire 1640 , which filled the vacuum left by the Mali and Songhai empires .
[EX A]:
PAIR_ANAPHORA