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:His father died in 1891 , so his mother took her four children and moved with her parents to Berea . Sentence 2:nan

Ex Output:
SINGLE_S_COORD


Ex Input:
Sentence 1:Facing charges that would have all but assured he would die in prison , he began making escape plans . Sentence 2:nan

Ex Output:
SINGLE_CATAPHORA


Ex Input:
Sentence 1:Nubians invaded Lower Egypt and took the throne of Egypt under Piye although they already controlled Thebes and Upper Egypt in the early years of Piye 's reign . Sentence 2:nan

Ex Output:

SINGLE_CONN_INNER_ANAPHORA