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: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:Supposedly invented by Leonardo da Vinci , the Italian Renaissance man , the wheellock action was an innovation that was not widely adopted due to the high cost of the clockwork mechanism . Sentence 2:nan
[A]: SINGLE_APPOSITION


[Q]: Sentence 1:Australian & New Zealand Journal of Statistics . Sentence 2:59 ( 4 ) : 433 .
[A]:
PAIR_NONE