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'.

Example 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
Example Output: SINGLE_CONN_INNER_ANAPHORA

Example Input: Sentence 1:Timmy accidentally wishes himself into a girl before Trixie 's birthday party , and she uses her new feminine mind to get the perfect gift for her . Sentence 2:However , it turns out that she likes boy stuff , too .
Example Output: PAIR_CONN_ANAPHORA

Example Input: Sentence 1:It is a bittersweet victory when the girls realize that although they stopped the alien theft . Sentence 2:nan
Example Output:
SINGLE_CONN_INNER_ANAPHORA