TASK DEFINITION: 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'.
PROBLEM: Sentence 1:Doctor Sun was born in Peking , People 's Republic of China , and was working as a scientist during the Cultural Revolution . Sentence 2:nan

SOLUTION: SINGLE_APPOSITION

PROBLEM: Sentence 1:The Israeli audience , enamored with Sanderson 's blend of humor , jokes and lighthearted music , was willing to accept Sanderson 's brilliant music only when masqueraded as ' simple pop ' , but was much less enthusiastic about more earnest musical attempts . Sentence 2:nan

SOLUTION: SINGLE_S_COORD

PROBLEM: Sentence 1:Arriving at Crater 101 , they transfer to a smaller Lunar Tractor and make their final approach to the complex . Sentence 2:nan

SOLUTION:
SINGLE_CATAPHORA