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:Ghinzani , who was also very lucky not to hit Martini , limped away from his broken Osella and Grand Prix racing having banged his ankle on the cars monocoque . Sentence 2:nan

Ex Output:
SINGLE_RELATIVE


Ex Input:
Sentence 1:O'Donnell was the starter for the first six games of the season , but they went 0 -- 6 under him . Sentence 2:nan

Ex Output:
SINGLE_S_COORD_ANAPHORA


Ex Input:
Sentence 1:At the university for five years , he was a captain of the university companies of the First Regiment of the Canadian Militia . Sentence 2:In 1876 he returned to Britain as the new Chair of Engineering at the Yorkshire College .

Ex Output:

PAIR_ANAPHORA