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:The composition history of John is complex , but most scholars see it taking place in stages beginning as early as before AD 70 and extending as late as the end of the century . Sentence 2:nan
Example Output: SINGLE_S_COORD_ANAPHORA

Example Input: Sentence 1:1891 -- The Mino -- Owari earthquake , the largest inland earthquake in Japan 's history , strikes Aichi Prefecture . Sentence 2:nan
Example Output: SINGLE_APPOSITION

Example Input: Sentence 1:The New Zealand band Fat Freddy 's Drop , whose debut album won the 2005 Gilles Peterson Worldwide Winners Award , were named after the comic . Sentence 2:nan
Example Output:
SINGLE_RELATIVE