The Only One - Three by Egantx7

Who is the only president to have seen two vice-presidents die in office while he was president?

Who is the only player to win three Olympic gold medals for the United States in men's basketball? He was drafted third in the 2003 NBA draft behind LeBron James and Darko Milicic, and topped them and Chris Bosh and Dwyane Wade for Rookie of the Year honors.

What is the only Asian nation that (a) borders only one other nation, and (b) has a majority of its citizens adhering to Roman Catholicism?

What is the only chemical element named for a person who was alive when the element's name was officially accepted and announced by IUPAC (International Union of Pure and Applied Chemistry)?

What is the only natural island to include the whole or parts of three independent nations?

What late individual is the only person to have won an Emmy (4), Grammy (4), Oscar (3), Tony (1), Golden Globe (2), and Pulitzer Prize?

What is the only major American city (population > 400,000) whose founding is credited to a woman?

Who was the only man elected President of the United States while he was serving in the House of Representatives? His tenure in the House would have ended anyway, as the Ohio legislature had already elected him to be a senator starting in January when his presidential victory forced him to turn down that job. He really should have taken the job in the senate!

Who is the only American actress to ever win a César Award (the French equivalent of the Oscars) for acting? She won the supporting actress award in 2015 for her role in Sils Maria. She also remains, as of 2016, the last woman to receive three consecutive Golden Raspberry nominations for Worst Actress (she won her last nomination for work in two films that year). Among her films are Panic Room, Into the Wild, and more recently Billy Lynn's Long Halftime Walk.

Splitting his time between linebacker and defensive end, while playing twice for the San Francisco 49ers, sandwiched around a stint with the Dallas Cowboys, which James Madison alum and 2015 Hall of Fame inductee is the only person to win 5 Super Bowl rings as a player? A very oblique hint is that he was drafted in 1986.

Aside from giraffes, what is the only other living member of the family giraffidae? These endangered animals with a strange combination of markings are today restricted to the northern and central regions of the DRC.

1980 was the only year in which a Grammy Award was given for Best Disco Recording. Identify this song, the only one to win that award, which Tony Clifton sings at the end of the film Man on the Moon and which younger folks might better remember as being the song which was played over the closing credits of The Martian. (edited at 7:53 am, January 1, 2017 (AWST))