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:The accuracy of the drawings in that work ( actually , two works , by father and son ) leaves much to be desired . Sentence 2:For example , the corridor containing Barbatus ' coffin is shown complete , when it has always ended in the rock ledge .
[EX A]: PAIR_CONN

[EX Q]: Sentence 1:The company 's lending business 118118Money , a subsidiary of kgb , launched as an online service in September 2013 . Sentence 2:nan
[EX A]: SINGLE_APPOSITION

[EX Q]: Sentence 1:The council privatised the airport in 1988 and it was bought by Biggin Hill Airport Ltd in 1994 , who agreed a 25 - year contract for the air fair . Sentence 2:nan
[EX A]:
SINGLE_S_COORD_ANAPHORA