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 Input:
Sentence 1:Chris reveals that he is a serial killer of women , and explains that he let Anne go on the night they met because he admired her tenacity . Sentence 2:nan

Ex Output:
SINGLE_CONN_INNER_ANAPHORA


Ex Input:
Sentence 1:Que'er , a quirky bird demon , rescues Xiaowei , and the two leave in search of a man who is willing to give his heart to Xiaowei so that she may become human . Sentence 2:nan

Ex Output:
SINGLE_CONN_INNER_ANAPHORA


Ex Input:
Sentence 1:Christ had proclaimed many centuries ago the rival principle of human equality ; but it had not been translated into political terms capable of being applied until the French Revolution had proclaimed the ' Rights of Man ' . Sentence 2:nan

Ex Output:

SINGLE_S_COORD_ANAPHORA