Which American actor, writer, producer, director, comedian and television host who has hosted the Academy Awards a number of times?
Billy Crystal
Title: 70th Academy Awards
Passage: The 70th Academy Awards ceremony, organized by the Academy of Motion Picture Arts and Sciences (AMPAS), took place on March 23, 1998, at the Shrine Auditorium in Los Angeles beginning at 6:00 p.m. PST / 9:00 p.m. EST.  During the show, AMPAS presented Academy Awards (commonly referred to as Oscars) in 24 categories honoring films released in 1997.  The ceremony, which was televised in the United States by ABC, was produced by Gil Cates and directed by Louis J. Horvitz.  Actor Billy Crystal hosted the show for the sixth time.  He first presided over the 62nd ceremony held in 1990, and he had hosted the previous year's gala.  Nearly a month earlier in an event held at the Regent Beverly Wilshire Hotel in Beverly Hills, California on February 28, the Academy Awards for Technical Achievement were presented by host Ashley Judd.
Title: Billy Crystal
Passage: William Edward Crystal (born March 14, 1948) is an American actor, writer, producer, director, comedian and television host.  He gained prominence in the 1970s for playing Jodie Dallas on the ABC sitcom "Soap" and became a Hollywood film star during the late 1980s and 1990s, appearing in the critical and box office successes "When Harry Met Sally..." (1989), "City Slickers" (1991), and "Analyze This" (1999) and providing the voice of Mike Wazowski in the "Monsters, Inc." franchise.
Title: 67th Academy Awards
Passage: The 67th Academy Awards ceremony, organized by the Academy of Motion Picture Arts and Sciences (AMPAS) took place on March 27, 1995, at the Shrine Auditorium in Los Angeles beginning at 6:00 p.m. PST / 9:00 p.m. EST.  During the ceremony, AMPAS presented Academy Awards (commonly referred to as the Oscars) in 23 categories honoring the films released in 1994.  The ceremony, televised in the United States by ABC, was produced by Gil Cates and directed by Jeff Margolis.  Comedian David Letterman hosted the show for the first time.  Three weeks earlier in a ceremony held at the Regent Beverly Wilshire Hotel in Beverly Hills, California on March 4, the Academy Awards for Technical Achievement were presented by host Jamie Lee Curtis.
70th Academy Awards Billy Crystal