QUES: Q: What instrument did artist Bill Monroe use?
A: The famous Lloyd Loar Master Model from Gibson (1923) was designed to boost the flagging interest in mandolin ensembles, with little success.
Does the answer answer the question?

ANS: no

QUES: Q: During the 19th century was there any advocates for the working children?
A: These acts were largely ineffective and after radical agitation, by for example the "Short Time Committees" in 1831, a Royal Commission recommended in 1833 that children aged 1118 should work a maximum of 12 hours per day, children aged 911 a maximum of eight hours, and children under the age of nine were no longer permitted to work.
Does the answer answer the question?

ANS: no

QUES: Q: How soon after planes crashed into them did the WTC towers collapse?
A: Both buildings collapsed within two hours from fire damage related to the crashes, destroying nearby buildings and damaging others.
Does the answer answer the question?

ANS: yes

QUES: Q: How many proteins is typical flagellum consist os?
A: Bacterial species differ in the number and arrangement of flagella on their surface; some have a single flagellum (monotrichous), a flagellum at each end (amphitrichous), clusters of flagella at the poles of the cell (lophotrichous), while others have flagella distributed over the entire surface of the cell (peritrichous).
Does the answer answer the question?

ANS:
no