Did Pink Floyd have a song about the French Riviera?
Rationale first then the answer.
Pink Floyd included the song San Tropez on the album Meddle. San Tropez, also known as Saint Tropez, is a town located on the French Riviera.. The answer is: yes.

Does Antarctica have a lot of problems relating to homelessness?
Rationale first then the answer.
Antarctica has no permanent residents. Exposure to the elements would be deadly for homeless people during certain times of year.. The answer is: no.

Was John Lennon known to be a good friend to Sasha Obama?
Rationale first then the answer.
John Lennon died in 1980. Sasha Obama was born in 2001.. The answer is: no.