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:Professor Amamori discovers a 10th planet in the Earth 's solar system , which he names La - Metal , while at his observatory in Tokyo . Sentence 2:nan

Output: SINGLE_RELATIVE


Input: Consider Input: Sentence 1:Although Bernstein left as music director in 1969 , he continued to lead the Young People 's Concerts as Conductor Emeritus until 1972 . Sentence 2:nan

Output: SINGLE_CONN_START


Input: Consider Input: Sentence 1:Although he was a very dedicated and loyal member of the party , he gained the nickname Dom Daantje ( literally : Dumb Danny ) for his naivety . Sentence 2:nan


Output: SINGLE_CONN_START