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:The slide still blocked the original road as of early 2018 , although temporary bridges allow one - way traffic around the slide and into the park . Sentence 2:nan

Output: SINGLE_CONN_INNER


Input: Consider Input: Sentence 1:Vidyapati tried his best , but could not locate the place of worship . Sentence 2:Finally , he could manage to marry Lalita , the daughter of Viswabasu .

Output: PAIR_CONN_ANAPHORA


Input: Consider Input: Sentence 1:Since the transition , it has been , however , extremely rare for a text to be written predominantly in classical Chinese , mainly because it lacks in words essential to describing modern life or expressing Western - originated concepts . Sentence 2:nan


Output: SINGLE_CONN_INNER_ANAPHORA