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:Going back to general quarters for the dawn alert at 0525 on the 29th , Bunch spotted planes at 0605 , but they remained out of range . Sentence 2:nan
[A]: SINGLE_CATAPHORA


[Q]: Sentence 1:Starting in 1955 , he served the University of the West Indies ( UWI ) as a lecturer in adult education and as a professor of Spanish and director of the Extra-Mural Studies Department . Sentence 2:nan
[A]: SINGLE_CATAPHORA


[Q]: Sentence 1:Although Szapolyai was backed by a majority of the Hungarian elite , Ferdinand nevertheless declared himself the legal king of Hungary with the support of his older brother Charles V , Holy Roman Emperor . Sentence 2:nan
[A]:
SINGLE_CONN_START