Does the sentence "The problem was exacerbated because the return current also had a tendency to flow through nearby iron pipes forming the water and gas mains." provide a valid answer to the question "How are stray earth currents kept to a manageable levels?"

A: no

Does the sentence "The city has a Mayor and is one of the 16 cities and towns in England and Wales to have a ceremonial sheriff who acts as a deputy for the Mayor." provide a valid answer to the question "Who's the current Mayor of Southampton?"

A: no

Does the sentence "The French officially abandoned the experiment in the early 19th century." provide a valid answer to the question "When was the idea of the Lodges for Adoption abandoned?"

A: yes

Does the sentence "Zinc sulfide (ZnS) is used in luminescent pigments such as on the hands of clocks, X-ray and television screens, and luminous paints." provide a valid answer to the question "What is the feature of zinc sufide that makes it useful in television screens?"

A:
yes