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'.

[Q]: Sentence 1:What triggers germination is unknown , and seedlings have also arisen from areas disturbed by sand mining , sometimes growing in higher concentrations than before the disturbance . Sentence 2:nan
[A]: SINGLE_S_COORD


[Q]: Sentence 1:After consulting the Army Corps of Engineers , a quick decision was made to open the floodgates to permit the rising water flow into the Mississippi , hence relieving pressure on the levees . Sentence 2:nan
[A]: SINGLE_CONN_INNER


[Q]: Sentence 1:However , KARI experienced more difficulties than expected in SLV development , because it required much stronger propellant power than KSR - III possessed to launch a satellite into orbit . Sentence 2:nan
[A]:
SINGLE_CONN_INNER_ANAPHORA