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:She told Ben Lee of Digital Spy that an actor had been cast , although she refused to reveal his identity . Sentence 2:nan
answer:
SINGLE_CONN_INNER


question:
Sentence 1:In 1957 he even advocated in talks with Israeli officials that Arab Christians in Israel be drafted for military service . Sentence 2:However , his suggestions were unpopular with both the Israeli government and Israeli Arab political leaders .
answer:
PAIR_CONN_ANAPHORA


question:
Sentence 1:The YouTube app , which had been a default app on iOS developed by Apple , was removed . Sentence 2:nan
answer:

SINGLE_RELATIVE