Does the sentence "YouTube is a global video-sharing website headquartered in San Bruno, California, United States." provide a valid answer to the question "Where is Youtube headquartered?"

A: yes

Does the sentence "The British Army's Anti-Aircraft Command was disbanded in March 1955, but during the 1960s and 1970s the RAF's Fighter Command operated long-range air -defence missiles to protect key areas in the UK." provide a valid answer to the question "Who protected airfields in WWII?"

A: no

Does the sentence "Transmission from a circularly polarized antenna received by a linearly polarized antenna (or vice versa) entails a 3 dB reduction in signal-to-noise ratio as the received power has thereby been cut in half." provide a valid answer to the question "What is the best for an recieving antenna for optimum reception?"

A: no

Does the sentence "As the paper is opposed to the EU it has referred to foreign leaders who it deemed hostile to the UK in unflattering terms." provide a valid answer to the question "Which German chancellor was criticized by The Sun?"

A:
no