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:U.S. submarines participated in the majority of naval battles in the Pacific theatre , but the submarines were most decisive in their blockade of Japan , for which Japan was dependent on its sea transport to provide resources for its war effort . Sentence 2:nan
[EX A]: SINGLE_S_COORD_ANAPHORA

[EX Q]: Sentence 1:Carrying a cargo of maize and pollards , she departed from Freetown on 10 February as a member of Convoy SL 20 , which joined Convoy SL 20F at sea on 25 February . Sentence 2:nan
[EX A]:
SINGLE_CATAPHORA