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 Q]: Sentence 1:Upper and rear parts were fabric covered . Sentence 2:Stability on the water was provided by a pair of unstepped floats under the wing , held a little beyond the central section on mountings within completely enclosing fairings .
[EX A]: PAIR_NONE

[EX Q]: Sentence 1:The council required Eastern churches wishing to be reunited with Rome to accept the Filioque as a legitimate expression of the faith , while it did not require those Christians to change the recitation of the creed in their liturgy . Sentence 2:nan
[EX A]: SINGLE_CONN_INNER_ANAPHORA

[EX Q]: Sentence 1:It is always at amateur level . Sentence 2:However , lacrosse in Scotland goes back to 1890 at St Leonards School , Fife , where women 's lacrosse had been introduced by Louisa Lumsden .
[EX A]:
PAIR_CONN