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'.

Input: Consider Input: Sentence 1:However , Nasir ud din Mahmud died suddenly in 1229 CE , and Iltutmish was at a loss as to a successor , because he felt that none of his several surviving sons . Sentence 2:nan

Output: SINGLE_CONN_INNER_ANAPHORA


Input: Consider Input: Sentence 1:So it all depends on what kind of look is desired and what is the allocated budget for it . Sentence 2:nan

Output: SINGLE_S_COORD


Input: Consider Input: Sentence 1:What triggers germination is unknown , and seedlings have also arisen from areas disturbed by sand mining , sometimes growing in higher concentrations than before the disturbance . Sentence 2:nan


Output: SINGLE_S_COORD