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:As they prepare for Thanksgiving , Jeffrey struggles to teach Hugh how to make the perfect pie and John makes plans to hunt for his turkey dinner . Sentence 2:Meanwhile , John finds out about Stella 's relationship with the doctor hired to replace him .

Ex Output:
PAIR_CONN_ANAPHORA


Ex Input:
Sentence 1:The principal consecrator was Metropolitan Maxim Hermaniuk . Sentence 2:Bishop Yakymyshyn retired on June 1 , 2007 , after reaching of the age limit .

Ex Output:
PAIR_NONE


Ex Input:
Sentence 1:Aminopterin ( or 4 - aminopteroic acid ) , the 4 - amino derivative of folic acid , is an antineoplastic drug with immunosuppressive properties often used in chemotherapy . Sentence 2:nan

Ex Output:

SINGLE_APPOSITION


