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:Attorney Pablo Oro , who had been one of the leaders in urging this move and in seeking patrons to help develop the law library , was given the responsibility for developing the program . Sentence 2:nan
Example Output: SINGLE_RELATIVE

Example Input: Sentence 1:Since the 2006 Palestinian legislative election and the formation of a Hamas government in the PA , Israel has regularly withheld the taxes it owes the PA . Sentence 2:nan
Example Output: SINGLE_CONN_START

Example Input: Sentence 1:Rea Vaya currently has around 71,000 passengers per day , and it is estimated will to save 1.6 million tons of CO2 equivalent emissions by 2020 . Sentence 2:nan
Example Output:
SINGLE_S_COORD_ANAPHORA