Does the sentence "Different systems are used for urban and intercity areas; some electric locomotives can switch to different supply voltages to allow flexibility in operation." provide a valid answer to the question "How do some locomotives function in order to be more flexible in operation?"

A: yes

Does the sentence "The Directorate of Operations is responsible for collecting foreign intelligence, mainly from clandestine HUMINT sources, and covert action." provide a valid answer to the question "What office is in charge of collecting foreign intelligence?"

A: yes

Does the sentence "Termed "the acoustic equivalent to Prozac", soft adult contemporary, a more adult-oriented version of AC, was born in the late 1970s and grew in the early 1980s." provide a valid answer to the question "What decade saw the birth of the soft adult contemporary format?"

A: yes

Does the sentence "The Macintosh was introduced by a US$1.5 million Ridley Scott television commercial, "1984"." provide a valid answer to the question "What did the television commercial "1984" introduce?"

A:
no