instruction:
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'.
question:
Sentence 1:Thus the Cnossians , in short time , not only lost most of their allies , but also their hegemony over the island . Sentence 2:Nevertheless they were still able to assist the Aetolian allies with 1000 archers in their war on the continent .
answer:
PAIR_CONN_ANAPHORA

question:
Sentence 1:The Aztec canoe fleets worked well for attacking the Spanish because they allowed the Aztecs to surround the Spanish on both sides of the causeway . Sentence 2:nan
answer:
SINGLE_CONN_INNER_ANAPHORA

question:
Sentence 1:Koirala led his country 's delegation to the United Nations and made carefully poised visits to China and India , then increasingly at odds over territorial disputes . Sentence 2:Yet , he was in trouble at home almost from the beginning .
answer:
PAIR_CONN_ANAPHORA