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 duplicate Fry froze himself to return to the future and be with Leela . Sentence 2:However , when he learned that time travel paradoxes were doomed , he canceled the wedding to spare Leela the pain of his inevitable death .

Ex Output:
PAIR_CONN_ANAPHORA


Ex Input:
Sentence 1:His granddaughter Esther Chemutai is also a runner , while he is a distant uncle to the siblings Linet Masai and Moses Masai . Sentence 2:nan

Ex Output:
SINGLE_CONN_INNER


Ex Input:
Sentence 1:Flooding in June 2013 * * * The whole cricket pitch was under Danube flood - water for 11 days in early June 2013 , the field only being 3.5 m above the usual level of the river , which is 1500m to the west . Sentence 2:nan

Ex Output:

SINGLE_CATAPHORA