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 Input: Sentence 1:Adam had served as a royal chancellor in 1166 -- 67 and was the prior of the cathedral in Ourense at the time of his elevation . Sentence 2:nan
Example Output: SINGLE_S_COORD_ANAPHORA

Example Input: Sentence 1:Thinking they were then dealing with the Allies , the troops of the Reich surrendered to the Resistance . Sentence 2:Therefore , a few hundred resistance fighters were able to capture 1,200 German soldiers , including 40 officers .
Example Output: PAIR_CONN

Example Input: Sentence 1:Going further , Elmo meets the Queen of Trash ( Vanessa Williams ) in a garbage dump . Sentence 2:nan
Example Output:
SINGLE_CATAPHORA