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'.

[EX Q]: 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
[EX A]: SINGLE_CONN_INNER

[EX Q]: Sentence 1:In 288 BC the Mamertines seized the city by treachery , killing all the men and taking the women as their wives . Sentence 2:The city became a base from which they ravaged the countryside , leading to a conflict with the expanding regional empire of Syracuse .
[EX A]: PAIR_ANAPHORA

[EX Q]: Sentence 1:Many witnesses told the court how Hilkka had complained about her husband hitting her , and her injuries . Sentence 2:She had repeatedly visited the doctor because of her injuries .
[EX A]:
PAIR_ANAPHORA