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:During the last 10 years notable progress has been made in the Southern States in meeting that equality requirement . Sentence 2:But that progress will be nullified by a program of rapid , enforced desegregation .

A: PAIR_CONN
****
Q: Sentence 1:Preminger contacted Robinson , who began working on the song , then visited Harburg for help with the lyrics . Sentence 2:nan

A:
SINGLE_RELATIVE
****