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: Sentence 1:Paladin Blake , CEO of Blake Aviation Security then warns the Fortune Hunters to leave Pacifica given Blake has a zeppelin containing an armada of fighters . Sentence 2:The Fortune Hunters however sabotage the zeppelin and destroy it , along with Nathan personally fighting Blake himself .
Example solution: PAIR_CONN_ANAPHORA
Example explanation: Given two sentences, they are correctly classified based on their discourse type which is 'PAIR_CONN_ANAPHORA' because there are two sentences that are connected and the words repeated at the beginning of successive clauses.

Problem: Sentence 1:In some situations , they have been accompanied , or followed , by civil unrest and armed rebellion . Sentence 2:nan

Solution: SINGLE_VP_COORD