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 Input:
Sentence 1:The two eastern platforms at Stapleton Road will be demolished to allow trains to run faster , although it has been suggested that they be kept for use in case of service disruptions . Sentence 2:nan

Ex Output:
SINGLE_CONN_INNER_ANAPHORA


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

Ex Output:
SINGLE_S_COORD


Ex Input:
Sentence 1:Although Bolton worked mostly in the West End in the 1930s , his biggest hit of the decade began on Broadway , a collaboration with his old friend Wodehouse , who had by then largely abandoned the theatre for novel - writing . Sentence 2:nan

Ex Output:

SINGLE_CONN_START