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:Ben and Lindsey have a wonderful time together , and after making love , he tells her it was one of the best nights of his life . Sentence 2:nan
[A]: SINGLE_S_COORD_ANAPHORA


[Q]: Sentence 1:Since the Lampropholis delicata species is not native to the area in which they are found , it is possible that the resulting morphs are caused by the exposure to a new environment and climate as this particular species ' activity level is temperature dependent . Sentence 2:nan
[A]: SINGLE_CONN_START


[Q]: Sentence 1:When isolated bronchial carcinoids are diagnosed , oncology guidelines recommend surgical resection with lymph node sampling . Sentence 2:However , as multiple carcinoids may develop in the setting of DIPNECH , a more conservative approach is often considered to preserve lung function .
[A]:
PAIR_CONN