Does the sentence "In 1847, Hungarian physician Ignac Fulop Semmelweis dramatically reduced the occurrency of puerperal fever by simply requiring physicians to wash their hands before attending to women in childbirth." provide a valid answer to the question "How did Semmelweis reduce puerperal fever?"

A: yes

Does the sentence "On February 12, 2014, Senator Martin Heinrich introduced a bill in the US Senate." provide a valid answer to the question "What did Senator Heinrich's bill require?"

A: no

Does the sentence "These styles generally have either two f-shaped soundholes like a violin (F-5 and A-5), or an oval sound hole (F-4 and A-4 and lower models) directly under the strings." provide a valid answer to the question "What mandolin is associate with Bluegrass music?"

A: no

Does the sentence "The Luftwaffe lost 18 percent of the bombers sent on the operations that day, and failed to gain air superiority." provide a valid answer to the question "The Luftwaffe lost what percentage of its bombers sent that day?"

A:
yes