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:Marriott was then able to track important metrics and provide superior customer service . Sentence 2:Additionally , Fairfield Inn placed a heavy emphasis on quality personnel selection to find friendly and positive staff that would also help reduce turnover .

A: PAIR_CONN_ANAPHORA
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Q: Sentence 1:Her sire Whiskey was a successful racehorse before breaking down in a race at Lewes . Sentence 2:At stud he sired 148 winners including The Derby winner Eleanor and the dams of the Derby winners Phantom and Priam .

A: PAIR_NONE
****
Q: Sentence 1:Immediately after World War I , the Manchester College of Technology offered him the newly established chair of textile technology , which he held until 1923 . Sentence 2:nan

A:
SINGLE_APPOSITION
****