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:An eager vigilante is causing a stir in the city , while Krang and Shredder take control of all the machines in the city . Sentence 2:nan

Output: SINGLE_CONN_INNER


Input: Consider Input: Sentence 1:She is put behind bars but she escapes with Robin 's help and they get married . Sentence 2:But she leaves him too and regroups with her old gang members and goes in search of their next victim .

Output: PAIR_CONN_ANAPHORA


Input: Consider Input: Sentence 1:However , in retrospect the Marquette poll accurately reflected the Wisconsin electorate 's vote . Sentence 2:However , the same poll showed President Obama holding a lead over Mitt Romney 51 - 43 .


Output: PAIR_CONN