question: On what day did airborne radar help intercept and destroy enemy aircraft for the first time ?
answer: the night of 22/23 July 1940
turker_answer: On the night of July 22/23 , 1940 , airborne radar helped intercept and destroy enemy aircraft for the first time .
rule-based: Airborne radar help intercepted and destroyed enemy aircraft for the first time on the night of 22/23 July 1940 .