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:Over 14,000 artillery rounds were fired in a 24 - hour period . Sentence 2:Finally , on September 5 , the North Koreans abandoned the ridge after UN forces succeeded in outflanking it .
answer:
PAIR_CONN


question:
Sentence 1:MacLeish found little value in Auslander 's writing . Sentence 2:However , MacLeish was happy that having Auslander in the post attracted many other poets , such as Robinson Jeffers and Robert Frost , to hold readings at the library .
answer:
PAIR_CONN


question:
Sentence 1:Here he had a dispute with a neighbour about water rights , which led to a lawsuit and a challenge , although the English Consul Kirkup succeeded in arranging the point of honour satisfactorily . Sentence 2:nan
answer:

SINGLE_RELATIVE