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:It was released in 1992 as the second single from her second studio album , Bad Day for Trains . Sentence 2:It peaked at number 7 on the RPM Country Tracks chart in November 1992 .

Output: PAIR_ANAPHORA


Input: Consider Input: Sentence 1:Including the previous incarnations as the Home Nations and Five Nations , this was the seventy - sixth series of the northern hemisphere rugby union championship . Sentence 2:nan

Output: SINGLE_CATAPHORA


Input: Consider Input: Sentence 1:Starting in 1955 , he served the University of the West Indies ( UWI ) as a lecturer in adult education and as a professor of Spanish and director of the Extra-Mural Studies Department . Sentence 2:nan


Output: SINGLE_CATAPHORA