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:On the other hand , some aspects of personal infrastructure will take a comparatively shorter amount of time . Sentence 2:For example , a cell phone can be bought quickly .

SOLUTION: PAIR_CONN

PROBLEM: Sentence 1:Seeking the power of the Flash so that he can restore history according to his own vision rather than another , Sinestro cuts off Abin 's hand , severing his connection with his ring . Sentence 2:nan

SOLUTION: SINGLE_CATAPHORA

PROBLEM: Sentence 1:A house in Blake Street , largely restored , was the birthplace of Admiral Blake in 1598 , and is now the Blake Museum . Sentence 2:nan

SOLUTION:
SINGLE_S_COORD