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:Lovegrass is the fifth studio album by Australian country music singer Sara Storer . Sentence 2:It was released in August 2013 and peaked at number 25 on the ARIA Charts .

Output: PAIR_ANAPHORA


Input: Consider Input: Sentence 1:Other amenities include a village hall , a sports field which is home to Welford Victoria F.C. , a youth centre and a pocket park . Sentence 2:nan

Output: SINGLE_APPOSITION


Input: Consider Input: Sentence 1:During routine exercise he often acted offensively to Tandy , Morres and Corbet , or they to him . Sentence 2:Consequently , he was given the option of joining those prisoners who had a general mess , or having a yard of his own in which to exercise .


Output: PAIR_CONN