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:He then joined Madras Christian College but quit , returned to Sri Lanka and took up law studies . Sentence 2:nan

Output: SINGLE_VP_COORD


Input: Consider Input: Sentence 1:Other musicians involved with the album include songwriter Marti Frederiksen , Swedish band Hardcore Superstar and Sixx : A.M. Sentence 2:members James Michael and DJ Ashba

Output: PAIR_NONE


Input: Consider Input: Sentence 1:The entire library occupies 24 KB of the cartridge ( in three banks , 8 KB each ) and can be switched off as necessary to release some memory . Sentence 2:nan


Output: SINGLE_VP_COORD