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:Care needs to be taken because the semantics are different when operands make use of more than one bit to represent a value . Sentence 2:nan
Example Output: SINGLE_CONN_INNER

Example Input: Sentence 1:The entire library occupies 24 KB of the cartridge ( in three banks , 8 KB each ) and can be switched off as necessary to release some memory . Sentence 2:nan
Example Output: SINGLE_VP_COORD

Example Input: Sentence 1:Although ABC initially refused Monk , they did air repeats of the show on ABC in the summer and fall of 2002 , and then again in the spring of 2004 . Sentence 2:nan
Example Output:
SINGLE_CONN_START