question: What was the average speed of a winning solar powered car in 1987 ?
answer: 67 kilometres per hour ( 42 mph )
turker_answer: The average speed of a winning solar powered car in 1987 was 67 kilometres per hour ( 42 mph ) .
rule-based: The average speed of a winning solar powered car in 1987 was 67 kilometres per hour ( 42 mph .