Q--Did any citizen of San Antonio vote for Boris Johnson?
A--My step-by-step reasoning: San Antonio is a city in Texas in the United States of America. Boris Johnson is the Prime Minister of the UK. Only UK and commonwealth citizens may vote in UK elections.
So, the answer is no.

Q--Is breakdancing safe for people with tendonitis?
A--My step-by-step reasoning: Tendonitis is a condition where the joints are inflamed. Strong motions in joints suffering from tendonitis can result in damage to nerves. Breakdancing is a style of dance that involves many vigorous motions. The downrock breakdancing maneuver involves balancing the body weight on the floor using one arm.
So, the answer is no.

Q--Was Alaska part of the Northern Army during the Civil War?
A--My step-by-step reasoning: The Civil War was from 1861 - 1865. The Northern Army consisted of soldiers from states north of the Mason-Dixon line. Alaska did not become part of the United States until 1867.
So, the answer is no.

Q--Does a person suffering from Thalassophobia enjoy oceanography?
A--
My step-by-step reasoning: Thalassophobia is a deep and persistent fear of the sea. Oceanography is the study of bodies of water. Oceanographers frequently observe and interact with bodies of water such as lakes, seas, and oceans.
So, the answer is no.