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:Schizachne is a genus of Eurasian and North American plants in the grass family . Sentence 2:The only accepted species is Schizachne purpurascens , commonly called false mesic .
[EX A]: PAIR_ANAPHORA

[EX Q]: Sentence 1:The route availability code is RA8 , but freight trains above a certain size must not pass each other on the bridge . Sentence 2:nan
[EX A]: SINGLE_S_COORD

[EX Q]: Sentence 1:It is formed around two roads , Cranebrook Lane and Pouk Lane , although the M6 Toll Road was built and started operation in 2003 , and passes through Hilton . Sentence 2:nan
[EX A]:
SINGLE_CONN_INNER