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: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
answer:
SINGLE_CATAPHORA


question:
Sentence 1:The role played by Murali was initially intended to be played by Karthik . Sentence 2:Similarly Laila replaced Sneha in the lead female role .
answer:
PAIR_NONE


question:
Sentence 1:Maurus was ordained a deacon , and subsequently , Benedict , prior to leaving for Monte Cassino , appointed him coadjutor at Subiaco . Sentence 2:nan
answer:

SINGLE_S_COORD_ANAPHORA