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'.

Input: Consider Input: 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 .

Output: PAIR_CONN


Input: Consider Input: Sentence 1:In 1946 the Pratts moved for a brief period to California , but returned to Florida to live in Boca Raton . Sentence 2:nan

Output: SINGLE_VP_COORD


Input: Consider Input: Sentence 1:The membrane is truncate just like the leaf - sheaths but is eciliated and 0.5 -- 3 millimetres ( 0.020 -- 0.118 in ) long . Sentence 2:nan


Output: SINGLE_VP_COORD