Question: What is the birthdate of this American retired professional basketball player, who played point guard, and who had 13.1 assists per game with the Los Angeles Lakers?

Context paragraphs:
1983–84 Los Angeles Lakers season: The 1983–84 season for the Los Angeles Lakers saw them lose in the 1984 NBA Finals against Larry Bird's Boston Celtics in seven well-fought games.  The Los Angeles Lakers, powered by Kareem Abdul-Jabbar (who broke the NBA's all-time total points record) and Magic Johnson with his 13.1 assists per game (tops in '84), ended up winning 54 games in the 1983–84 NBA season.  On April 5, 1984, Kareem Abdul-Jabbar had a 12-foot shot over Mark Eaton of the Utah Jazz 1 to surpass Wilt Chamberlain as the NBA's all-time leading scorer with 31,421 points.

Brian Winters: Brian Joseph Winters (born March 1, 1952) is an American former basketball player and coach.  He attended academic and athletic powerhouse Archbishop Molloy High School in Queens, New York, graduating in 1970.  He then played collegiately with the University of South Carolina and was the 12th pick in the 1974 NBA Draft, taken by the Los Angeles Lakers.  He made the NBA All-Rookie Team with the Lakers, and was then traded to the Milwaukee Bucks as part of the trade that brought Kareem Abdul-Jabbar to the Lakers.  He had a productive nine-year career that included two appearances in the NBA All-Star Game and playing on six playoffs teams.  Winters averaged 16.2 points and 4.1 assists over his career, with his best years coming from 1975 to 1979 when he averaged over 19 points and slightly less than 5 assists per game.  His number 32 was retired by the Bucks.

Robbie Weingard: Robbie Weingard (born May 15, 1963) is an American former basketball player known for his college career at Hofstra University.  Between 1981 and 1985, Weingard played point guard for the Hofstra Pride.  He set still-standing program records for assists in a game (16) and season (228).  As a senior in 1984–85, Weingard averaged an NCAA Division I-leading 9.50 assists per game en route to becoming only the fourth officially recognized NCAA assists leader at that point.  After graduating, Weingard played for Team USA in the 1985 Maccabiah Games, helping them to win a gold medal.  He never played professionally.

Jai Lucas: Jai Powell Lucas (born December 5, 1988) is an assistant coach for the Texas Longhorns and a former American professional basketball player, as well as a former NCAA college basketball player for the Texas Longhorns.  He was a McDonald's All American and was rated 20th by ESPN class of 2007.  Lucas previously played for the University of Florida, but decided to transfer from the Florida Gators men's basketball team, due to lack of playing time at his favored position of point guard.  Though Lucas started for the Gators, he was moved out of his natural position to that of the shooting guard in the starting rotation, because teammate Nick Calathes was favored at the point guard position.  He averaged just below double figures in scoring, and also has 2.3 assists per game.  In November 2008, Lucas announced his intentions to transfer from Florida.  Jai Lucas announced his intention to transfer to Texas on December 28, 2008.

Isaiah Wilson: Isaiah "Bunny" Wilson (born May 31, 1948) is a former professional basketball player who played in the NBA and ABA.  Wilson was drafted with the twelfth pick in the second round of the 1971 NBA Draft.  He played in 48 games for the Detroit Pistons in the 1971-72 NBA season and averaged 3.5 points per game, 0.9 assists per game and 1.0 rebound per game.  He also played one season in the ABA for the Memphis Tams and averaged 6.3 points per game, 2.4 assists per game and 1.3 rebounds per game.

Craig Lathen: Craig "Cubby" Lathen is an American basketball player who is most notable for his time spent as point guard for the UIC Flames men's basketball team in the early 1980s.  He was the 1983–84 NCAA Division I men's basketball season assists leader and earned The Summit League Men's Basketball Player of the Year back when The Summit League was known as the Association of Mid-Continent Universities (AMCU), which later became known as the Mid-Continent Conference.  He holds the Summit League records for career and single-season assists per game.  He holds the UIC records for career, single-season and single-game assists as well as single-season steals.  During his junior season as a high school basketball player, his East Aurora High School team set the Illinois record for most single-season 100-point performances.  In college, he helped his school post its all-time highest score with a 120-point night.  Due to academic difficulties he only played nine games as a senior.  His Summit League records are also abbreviated by the fact that his freshman season predated the conference.

Magic Johnson: Earvin "Magic" Johnson Jr. (born August 14, 1959) is an American retired professional basketball player and current president of basketball operations of the Los Angeles Lakers of the National Basketball Association (NBA).  He played point guard for the Lakers for 13 seasons.  After winning championships in high school and college, Johnson was selected first overall in the 1979 NBA draft by the Lakers.  He won a championship and an NBA Finals Most Valuable Player Award in his rookie season, and won four more championships with the Lakers during the 1980s.  Johnson retired abruptly in 1991 after announcing that he had contracted HIV, but returned to play in the 1992 All-Star Game, winning the All-Star MVP Award.  After protests from his fellow players, he retired again for four years, but returned in 1996, at age 36, to play 32 games for the Lakers before retiring for the third and final time.

Frank Kudelka: Frank Carl Kudelka (June 25, 1925 - May 4, 1993), nicknamed Apples, was an American National Basketball Association (NBA) player.  In his first two years at Saint Mary's College of California, Kudelka averaged 18.1 points per game.  Once the shotclock was introduced to college basketball in his junior season, Frank averaged 20.4 points per game.  He was the nation's fourth leading scorer.  As a senior at Saint Mary's, Frank averaged 16.2 points per game.  He was also named an All-American basketball player by the Helms Foundation after his senior season.  Frank made his NBA debut in the 1949-50 NBA season for the Chicago Stags.  In his first NBA season, Frank averaged 6.7 points and 2.0 assists per game.  Frank played four seasons in the NBA with the Stags, Washington Capitols, Boston Celtics, Baltimore Bullets and Philadelphia Warriors.  In his NBA career, Frank averaged 7.2 points, 3.2 rebounds, and 2.1 assists per game.

Gene Wiley: Gene Wiley (born November 12, 1937) is a former NBA basketball player for the Los Angeles Lakers.  He attended Carver High School in Amarillo, Texas and Wichita State University.  He was drafted in 1962 with the eighth pick in the second round by the Los Angeles Lakers.  Wiley played four seasons in the NBA and averaged 4.2 points per game and 7.2 rebounds per game.  In 1967, Wiley returned to professional basketball to play in the ABA.  In one ABA season, he played for the Oakland Oaks and the Dallas Chaparrals.  His ABA statistics were 2.0 points per game and 2.2 rebounds per game.

Derrick Mercer: Derrick Mercer is an American basketball player who played point guard for American University.  During the 2008–09 season, he averaged 11.5 points per game, 4.3 rebounds per game, and 1.1 steals per game.  He also averaged 4.4 assists per game.

Supporting paragraphs: 1983–84 Los Angeles Lakers season Magic Johnson
Answer: August 14, 1959