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:On July 16 , 1925 , Mehaffey was appointed assistant to the executive officer of the Arlington Memorial Bridge Commission , an independent agency of the U.S. federal government established by Congress . Sentence 2:In that capacity , he helped oversee the design and early construction of the bridge .

A: PAIR_ANAPHORA
****
Q: Sentence 1:The celebrated Bodhi tree still exists , but is very much decayed ; one large stem , with three branches to the westward , is still green , but the other branches are barkless and rotten . Sentence 2:nan

A: SINGLE_S_COORD
****
Q: Sentence 1:At 23 : 12 Washington obtained a visual sighting , and the South Dakota reported that they also had a sighting over the TBS ( Talk Between Ships ) radio . Sentence 2:nan

A:
SINGLE_S_COORD_ANAPHORA
****