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:As she is about to leave town , Nick races to the bus stop to persuade Roxy to stay . Sentence 2:However , the relationship fizzles out almost immediately ; After Nick 's brother Shane ( Dieter Brummer ) is arrested and he and Roxy decide be just friends .
[A]: PAIR_CONN_ANAPHORA


[Q]: Sentence 1:Although municipal elections are local only , and local results vary , they do function as a measure of the sentiments and party strengths also nationally . Sentence 2:nan
[A]: SINGLE_CONN_START


[Q]: Sentence 1:Robert M. Ricketts developed the Utility arch in 1950s and it is considered to be an integral part of the Bioprogressive Therapy in Orthodontics . Sentence 2:nan
[A]:
SINGLE_S_COORD_ANAPHORA