Question: Renee Powell and Althea Gibson were the first two African-American female golfers on the LPGA Tour. In what other sport did Gibson win major championships?

Context paragraphs:
2004 LPGA Tour: The 2004 LPGA Tour was a series of weekly golf tournaments for elite female golfers from around the world which took place from March through December 2004.  The tournaments were sanctioned by the United States-based Ladies Professional Golf Association (LPGA).  This was the 55th season since the LPGA Tour officially began in 1950.  The season consisted of 32 official money events.  Total prize money for all tournaments was $42,875,000.

Renee Powell: Renee Powell (born May 4, 1946) is an American professional golfer who played on the U.S.-based LPGA Tour and is currently head professional at her family's Clearview Golf Club in East Canton, Ohio.  She was the second African-American woman ever to play on the LPGA Tour.  Althea Gibson was the first African-American LPGA Tour member, joining in 1963.  Powell joined in 1967, and played on Tour from 1967 to 1980.  It was not until 1995 that another African-American woman played on the tour.  LaRee Sugg played on Tour from 1995 to 1997, and from 2000 to 2001.

Wachovia LPGA Classic: The Wachovia LPGA Classic was an annual golf tournament for professional female golfers on the LPGA Tour that took place at the Berkleigh Country Club in Kutztown, Pennsylvania from 1996 through 2004.  Betsy King, LPGA Tour player and native of nearby Reading, served as the tournament host.

2006 LPGA Tour: The 2006 LPGA Tour was a series of weekly golf tournaments for elite female golfers from around the world which took place from February through December 2006.  The tournaments were sanctioned by the United States-based Ladies Professional Golf Association (LPGA).  In 2006, prize money on the LPGA Tour exceeded US$50 million for the first time in the history of the LPGA Tour.

Sherri Steinhauer: Sherri Steinhauer (born December 27, 1962) is an American professional golfer who plays on the Legends Tour.  She retired from the LPGA Tour in 2012 after a 26-year career.  She was born in Madison, Wisconsin and attended The University of Texas at Austin.  Her rookie season on the LPGA Tour was 1986.  She has won eight tournaments on the Tour, including two major championships, the 1992 du Maurier Classic and 2006 Women's British Open.  She also won the British Open in 1998 and 1999 before it became an LPGA major.

2008 LPGA Tour: The 2008 LPGA Tour was a series of weekly golf tournaments for elite female golfers from around the world that took place from February through December 2008.  The tournaments were sanctioned by the United States-based Ladies Professional Golf Association (LPGA).  In 2008, prize money on the LPGA Tour was $60.3 million, the highest to date in the history of the tour.

LPGA: The Ladies Professional Golf Association (LPGA) is an American organization for female professional golfers.  The organization is headquartered in Daytona Beach, Florida, and is best known for running the LPGA Tour, a series of weekly golf tournaments for elite female golfers from around the world.

List of golfers with most LPGA Tour wins: This table lists players with 10 or more wins on the LPGA Tour.  It is based on the list on the LPGA Tour's official site, which differs slightly from the main win lists on player's personal profiles on the site.  The wins counted here include professional titles won before the tour was founded in 1950; and LPGA Tour events won as an amateur, or as an international invitee before joining the LPGA Tour.  They do not include team events, unofficial events, or official wins on other professional tours, of which a few of the golfers listed, such as Laura Davies and Annika Sörenstam, have many.

2007 LPGA Tour: The 2007 LPGA Tour was a series of weekly golf tournaments for elite female golfers from around the world that took place from February through December 2007.  The tournaments were sanctioned by the United States-based Ladies Professional Golf Association (LPGA).  In 2007, prize money on the LPGA Tour was $54.285 million, the highest to date.

Althea Gibson: Althea Gibson (August 25, 1927 – September 28, 2003) was an American tennis player and professional golfer, and the first black athlete to cross the color line of international tennis.  In 1956, she became the first person of color to win a Grand Slam title (the French Open).  The following year she won both Wimbledon and the U.S. Nationals (precursor of the U.S. Open), then won both again in 1958, and was voted Female Athlete of the Year by the Associated Press in both years.  In all, she won 11 Grand Slam tournaments, including six doubles titles, and was inducted into the International Tennis Hall of Fame and the International Women's Sports Hall of Fame.  "She is one of the greatest players who ever lived," said Robert Ryland, a tennis contemporary and former coach of Venus and Serena Williams. " Martina couldn't touch her.  I think she'd beat the Williams sisters."  In the early 1960s she also became the first black player to compete on the women's professional golf tour.

Supporting paragraphs: Renee Powell Althea Gibson
Answer: tennis