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:During the last 10 years notable progress has been made in the Southern States in meeting that equality requirement . Sentence 2:But that progress will be nullified by a program of rapid , enforced desegregation .

Output: PAIR_CONN


Input: Consider Input: Sentence 1:Sudanese diplomats had assisted the planned attack on the United Nations headquarters . Sentence 2:Consequently , the US government placed Sudan on a watch list of terrorist countries .

Output: PAIR_CONN_ANAPHORA


Input: Consider Input: Sentence 1:Although the Roman -- Parthian War ( 161 - 66 ) started auspiciously for the Parthians , after the Romans recovered from the first shock and setbacks , they counterattacked , restored Sohaemus to the Armenian throne and invaded the Parthian Empire . Sentence 2:nan


Output: SINGLE_CONN_START