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:Only then can the call for jihad be meaningful , because the Palestinians can not along liberate Palestine without the help of other Muslims . Sentence 2:nan
Example Output: SINGLE_CONN_INNER

Example Input: Sentence 1:Although Harvester was the nation 's fourth - largest company at the time he assumed control , McCardell triggered a strike by unionized employees which ended disastrously for the company and led to its eventual demise . Sentence 2:nan
Example Output: SINGLE_CONN_START

Example Input: Sentence 1:Alex Kotzky , who drew and inked in a tight and crisp realistic style , was the artist of Apartment 3 - G for more than 30 years . Sentence 2:nan
Example Output:
SINGLE_RELATIVE