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'.

Q: Sentence 1:Little is known about his life , but according to tradition he was a companion of Saint Oswald at Iona . Sentence 2:nan

A: SINGLE_S_COORD
****
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 .

A: PAIR_CONN
****
Q: Sentence 1:Delgado Chalbaud was twice a betrayer , but Venezuelan historians tend to speak well of him , analogously as they argue in America that John F. Kennedy would not have allowed the Vietnam War to escalate . Sentence 2:nan

A:
SINGLE_S_COORD_ANAPHORA
****