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:Descriptions of registered cultivars . Sentence 2:Retrieved 2006 - 11 - 15 .
[EX A]: PAIR_NONE

[EX Q]: Sentence 1:However , becoming self - aware , the Kyodain had other plans and fatally injured Blink . Sentence 2:The Space Ironmen are an homage to the characters from Space Ironmen Kyodyne , which was created by Shotaro Ishinomori .
[EX A]: PAIR_NONE

[EX Q]: Sentence 1:Interstate 520 ( I - 520 ) is a 23.34 - mile - long ( 37.56 km ) auxiliary route from Augusta , Georgia to North Augusta , South Carolina . Sentence 2:Approximately 16.14 miles ( 25.97 km ) of the highway is in Georgia .
[EX A]:
PAIR_NONE