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 Input:
Sentence 1:Beginning on January 30 , 1951 , Dodd led his platoon against Hill 256 , a strongly defended position near Subuk , Korea , as part of Operation Thunderbolt . Sentence 2:nan

Ex Output:
SINGLE_CATAPHORA


Ex Input:
Sentence 1:PA 436 was assigned in the 1928 numbering of roads in Pennsylvania and not paved until 1932 . Sentence 2:The road 's other lone major intersection on PA 436 is for Jefferson SR 3012 .

Ex Output:
PAIR_ANAPHORA


Ex Input:
Sentence 1:The International Pool in Leeds was closed in 2007 and razed to the ground in 2009 . Sentence 2:nan

Ex Output:

SINGLE_VP_COORD