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'.

Q: Sentence 1:This topological space is zero - dimensional , and in particular , each point is an irreducible component . Sentence 2:nan

A: SINGLE_S_COORD
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Q: Sentence 1:His father was a ploughmaker who developed a business making agricultural implements . Sentence 2:Bentall was educated at private schools at Maldon and Brentwood and at the age of 22 went into his father 's business as an engineer .

A: PAIR_NONE
****
Q: Sentence 1:As she is about to leave town , Nick races to the bus stop to persuade Roxy to stay . Sentence 2:However , the relationship fizzles out almost immediately ; After Nick 's brother Shane ( Dieter Brummer ) is arrested and he and Roxy decide be just friends .

A:
PAIR_CONN_ANAPHORA
****