Task: Discourse Relation Classification
Input (English): Sentence 1:On 17 August 1940 , the first flight of the second prototype , L7245 , which was complete with full armament and operationally - representative equipment , was performed by Cordes from Radlett Aerodrome . Sentence 2:Upon its service acceptance , the HP57 was given the service name Halifax .
Output (English): PAIR_NONE