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:He concedes , however , that change is difficult because equal segments of Puerto Ricans desire statehood or continuation of the status quo . Sentence 2:nan
SINGLE_CONN_INNER

Sentence 1:After the conclusion of this most unfortunate episode in Delhi 's history , Nader 's officials began collecting taxes and some were also sent out to Delhi 's environs to do the same . Sentence 2:nan
SINGLE_S_COORD

Sentence 1:Marriott was then able to track important metrics and provide superior customer service . Sentence 2:Additionally , Fairfield Inn placed a heavy emphasis on quality personnel selection to find friendly and positive staff that would also help reduce turnover .

PAIR_CONN_ANAPHORA