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:Some people have claimed that members of Operation Vanguard have been meting out selective punishment to galamseyers . Sentence 2:Unproven allegations of bribe - taking have been leveled against some service men of the operation .
Example Output: PAIR_NONE

Example Input: Sentence 1:Since the annual game was renewed in 1995 , it has been played only once at Colorado State , in 1996 at the Rams ' former home of Hughes Stadium . Sentence 2:nan
Example Output: SINGLE_CONN_START

Example Input: Sentence 1:City failed to win for a third successive game when they drew 0 -- 0 with Chester City . Sentence 2:Another 0 -- 0 draw followed as City 's run without victory extended to four games in the first game of the festive period at Lincoln City .
Example Output:
PAIR_NONE