You will be given a definition of a task first, then some input of the task.
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'.

Sentence 1:Barzola faced Arnold Allen at UFC 220 on January 20 , 2018 . Sentence 2:However , Allen was pulled from the fight on January 11 due to alleged visa issues which restricted his ability to travel , and he was replaced by Matt Bessette .
Output:
PAIR_CONN_ANAPHORA