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:Its dial is rotated so that the current atmospheric pressure from a known accurate and nearby barometer . Sentence 2:nan
answer:
SINGLE_CONN_INNER


question:
Sentence 1:Although such a thing is not possible today , it represents a holy grail for researchers into cognitive models of information retrieval . Sentence 2:nan
answer:
SINGLE_CONN_START


question:
Sentence 1:One word of each pair is presented in a random order and the participant is asked to recall the item with which it was originally paired . Sentence 2:nan
answer:

SINGLE_S_COORD_ANAPHORA