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'.

[EX Q]: Sentence 1:During an uplink , the rover is told where to go , but not exactly how to get there . Sentence 2:Instead , the command contains the coordinates of waypoints toward a desired destination .
[EX A]: PAIR_CONN

[EX Q]: Sentence 1:The fluid pumping efficiency of a valveless system , however , is not necessarily lower than that having valves . Sentence 2:In fact , many fluid - dynamical systems in nature and engineering more or less rely upon valveless pumping to transport the working fluids therein .
[EX A]: PAIR_CONN

[EX Q]: Sentence 1:Cardinal Pole is a Roman Catholic school although it admits non-Catholic pupils . Sentence 2:nan
[EX A]:
SINGLE_CONN_INNER_ANAPHORA