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:Mahishasur gets into deep Tapasya to Brahma and receives a boon that only a Female having the powers of Tridevs can kill him . Sentence 2:Meanwhile , Parvati is born to a fisherman named as Matsya Parvati .
Example Output: PAIR_CONN

Example Input: Sentence 1:Although Prescott and senior Tyler Russell had shared quarterback duties throughout the regular season , Prescott had the job to himself in the Liberty Bowl while Russell recovered from surgery to repair a torn labrum in his throwing shoulder . Sentence 2:nan
Example Output: SINGLE_CONN_START

Example Input: Sentence 1:Surviving to become the most abundant baleen whale in the world , it is now one of the mainstays of the industry alongside its cosmopolitan counterpart the common minke . Sentence 2:nan
Example Output:
SINGLE_CATAPHORA