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:If Chinlestegophis is indeed both an advanced stereospondyl and a relative of caecilians , this means that although all lissamphibians are descended from temnospondyls . Sentence 2:nan

A: SINGLE_CONN_INNER
****
Q: Sentence 1:Since the 1970s , several governments have made plans for the construction of the A102 outer ringway , which would run from Antwerpen - Noord junction to the Wommelgem roundabout junction to the east of Antwerp . Sentence 2:nan

A: SINGLE_CONN_START
****
Q: Sentence 1:With steady yet gentle training , this breed will be obedient and devoted to its owner . Sentence 2:Stabyhouns should never be vicious or snappy .

A:
PAIR_NONE
****