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'.

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 .
PAIR_CONN_ANAPHORA

Sentence 1:Pulitzer Prize for Breaking News Reporting was not awarded because no single entry received the necessary majority for the prize . Sentence 2:nan
SINGLE_CONN_INNER

Sentence 1:Western New Mexico University and Montana State University - Billings joined in 2005 . Sentence 2:However , WNMU re-joined the Rocky Mountain Athletic Conference in 2006 and MSUB joined the Great Northwest Athletic Conference in 2007 .

PAIR_CONN_ANAPHORA