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'.
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Question: 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 .

Answer: PAIR_ANAPHORA


Question: 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 .

Answer: PAIR_ANAPHORA


Question: Sentence 1:The Aztec canoe fleets worked well for attacking the Spanish because they allowed the Aztecs to surround the Spanish on both sides of the causeway . Sentence 2:nan

Answer:
SINGLE_CONN_INNER_ANAPHORA