question: How much fuel did electric train used less than diesel in the middle of 1970 in USSR ?
answer: 25 % less fuel per ton-km
turker_answer: Electric trains used 25 % less fuel per ton-km than diesel in the middle of 1970 in USSR .
rule-based: Electric train used 25 % less fuel per ton-km less than diesel in the middle of 1970 in USSR .