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:For large numbers , the Poisson distribution approaches a normal distribution about its mean , and the elementary events ( photons , electrons , etc . ) are no longer individually observed , typically making shot noise in actual observations indistinguishable from true Gaussian noise . Sentence 2:nan

Ex Output:
SINGLE_S_COORD


Ex Input:
Sentence 1:Durgapur is by far the most industrialised city in eastern India and the second planned city in India . Sentence 2:It started with the first prime minister of independent India , Jawaharlal Nehru .

Ex Output:
PAIR_ANAPHORA


Ex Input:
Sentence 1:After everyone has introduced themselves , Ashley invites a number of the members of Diversity to join him and gives the group a demonstration of what level of dance they are expected to reach by the end of their training . Sentence 2:nan

Ex Output:

SINGLE_VP_COORD