TASK DEFINITION: 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'.
PROBLEM: Sentence 1:The two women remained friends throughout their lives , although they often lived apart . Sentence 2:nan

SOLUTION: SINGLE_CONN_INNER_ANAPHORA

PROBLEM: Sentence 1:Ben and Lindsey have a wonderful time together , and after making love , he tells her it was one of the best nights of his life . Sentence 2:nan

SOLUTION: SINGLE_S_COORD_ANAPHORA

PROBLEM: Sentence 1:Beginning in 1970 , Heinlein had a series of health crises , broken by strenuous periods of activity in his hobby of stonemasonry . Sentence 2:nan

SOLUTION:
SINGLE_CATAPHORA