Does the sentence "Most insects, except some species of cave crickets, are able to perceive light and dark." provide a valid answer to the question "Most insects have what kind of vision?"

A: no

Does the sentence "Some electric traction systems provide regenerative braking that turns the train's kinetic energy back into electricity and returns it to the supply system to be used by other trains or the general utility grid." provide a valid answer to the question "What is the principal alternative to electric railways?"

A: no

Does the sentence "Thus, one can find odayal (judges), xeer boggeyaal (jurists), guurtiyaal (detectives), garxajiyaal (attorneys), murkhaatiyal (witnesses) and waranle (police officers) to enforce the law." provide a valid answer to the question "What does the Xeer system call cops?"

A: yes

Does the sentence "Bortolazzi said in this book that the new wire strung mandolins were uncomfortable to play, when compared with the gut-string instruments." provide a valid answer to the question "How many strings did the Cremonese Mandolin have?"

A:
no