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'.

Ex Input:
Sentence 1:The song is frequently sung in The Return of Peter Grimm , an RKO film released in 1935 , and the second screen adaptation of David Belasco 's Broadway hit . Sentence 2:nan

Ex Output:
SINGLE_APPOSITION


Ex Input:
Sentence 1:The GMK Rekord was based on the German - designed Opel Rekord D. In August 1975 , a version of the Rekord , known as the Rekord Royale was launched by GMK . Sentence 2:nan

Ex Output:
SINGLE_APPOSITION


Ex Input:
Sentence 1:The origins of this particular custom are unknown , although a widespread rumor tells that it started with catholic pilgrims from the south of India and Sri Lanka . Sentence 2:nan

Ex Output:

SINGLE_CONN_INNER