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 continued to play for the Dynamos in 1985 , but the team played as an independent . Sentence 2:nan
Example Output: SINGLE_S_COORD

Example Input: Sentence 1:However , in retrospect the Marquette poll accurately reflected the Wisconsin electorate 's vote . Sentence 2:However , the same poll showed President Obama holding a lead over Mitt Romney 51 - 43 .
Example Output: PAIR_CONN

Example Input: Sentence 1:This sura , which consists of seven verses , is the most often recited sura of the Quran : Sentence 2:nan
Example Output:
SINGLE_RELATIVE