Q: Did any citizen of San Antonio vote for Boris Johnson?
A: no
Explain how we arrive at this answer:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Explanation: 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.