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:On clay season , she played four ITF tournaments and best result was in Trnava , Slovakia , when she went to semifinal . Sentence 2:nan
Example Output: SINGLE_S_COORD

Example Input: Sentence 1:Born in Montevideo , Sosa started his career in Danubio at the age of 15 , being one of the youngest footballers to play in the Uruguayan First Division . Sentence 2:He played for Danubio from 1982 to 1985 , when he was transferred to Spain 's Real Zaragoza .
Example Output: PAIR_ANAPHORA

Example Input: Sentence 1:Delilah 's cousin Chas Dingle ( Lucy Pargeter ) , a barmaid at the Woolpack pub , saw David with Katie Sugden ( Sammy Winward ) . Sentence 2:nan
Example Output:
SINGLE_APPOSITION

