question: What was the average speed of a winning solar powered car by 2007 ?
answer: 90.87 kilometres per hour ( 56.46 mph )
turker_answer: The average speed of a winning solar powered car by 2007 was 90.87 kilometres per hour ( 56.46 mph ) .
rule-based: The average speed of a winning solar powered car by 2007 was 90.87 kilometres per hour ( 56.46 mph .