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:Returning to France the next year in the company of Wescott and Wheeler , he traveled around Europe for the next several years , always with his camera at hand . Sentence 2:nan

A: SINGLE_CATAPHORA
****
Q: Sentence 1:In Saccharomyces cerevisiae ( Baker 's yeast ) , the transcriptional regulation of the INO1 gene encoding inositol - 3 - phosphate synthase has been studied in detail and its expression is sensitive to the availability of phospholipid precursors as well as growth phase . Sentence 2:nan

A: SINGLE_S_COORD_ANAPHORA
****
Q: Sentence 1:This goes nowhere , so Marge signs them up for the Relation Ship to solve their problems . Sentence 2:Meanwhile , while Homer 's away , Marge takes over his Fantasy Football league .

A:
PAIR_CONN
****