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:The captured soldiers were led into a large field with Fierro on one end , and a wall on the other . Sentence 2:They were informed , if they were to reach the opposite end and climb over the wall they would be allowed to continue on free .

Output: PAIR_ANAPHORA


Input: Consider Input: Sentence 1:Nothing of Espadero 's music has remained in the repertoire , yet his later pieces -- allegedly his best output , albeit never printed - remain to be investigated . Sentence 2:nan

Output: SINGLE_S_COORD_ANAPHORA


Input: Consider Input: Sentence 1:Although he advocated the emulation of Western models to improve overall productivity and worker relations , Hoveyda was very outspoken in favour of expelling foreign technicians and attracting indigenous sources of labour . Sentence 2:nan


Output: SINGLE_CONN_START