question: At the start of the Franco-Prussian War , what was the age of the Dreyse gun 's design ?
answer: 25-year-old design
turker_answer: At the start of the Franco-Prussian War , the Dreyse gun 's design was 25 years old .
rule-based: At the start of the Franco-Prussian War , the age of the Dreyse gun 's design was 25-year-old design .