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:Visiting Tom 's grave , Alice finds a note left by Doug which reveals the killer to be Alice 's friend Marlena Evans . Sentence 2:nan

A: SINGLE_CATAPHORA
****
Q: Sentence 1:Koirala led his country 's delegation to the United Nations and made carefully poised visits to China and India , then increasingly at odds over territorial disputes . Sentence 2:Yet , he was in trouble at home almost from the beginning .

A: PAIR_CONN_ANAPHORA
****
Q: Sentence 1:She felt that the chorus was more melodic but it was the lyrics and the dance beats which did not complete the track . Sentence 2:nan

A:
SINGLE_S_COORD_ANAPHORA
****