Question:  Michael Edward Curry served as head coach for an American Professional basketball team that has won how many NBA championchips?

Context paragraphs:
Detroit Pistons: The Detroit Pistons are an American professional basketball team based in Detroit, Michigan.  The Pistons compete in the National Basketball Association (NBA) as a member club of the league's Eastern Conference Central Division.  The team plays its home games at Little Caesars Arena and was founded in Fort Wayne, Indiana as the Fort Wayne (Zollner) Pistons in 1941, a member of the National Basketball League (NBL).  The Pistons joined the Basketball Association of America (BAA) in 1948.  In 1949, the NBL and BAA merged to become the NBA, and the Pistons became part of the merged league.  Since moving to Detroit in 1957, the Pistons have won three NBA championships in 1989, 1990 and 2004.

Stephen Curry: Wardell Stephen Curry II (born March 14, 1988) is an American professional basketball player for the Golden State Warriors of the National Basketball Association (NBA).  Many players and analysts have called him the greatest shooter in NBA history.  In 2014–15, Curry won the NBA Most Valuable Player Award and led the Warriors to their first championship since 1975.  The following season, he became the first player in NBA history to be elected MVP by a unanimous vote and to lead the league in scoring while shooting above 50–40–90.  That same year, the Warriors broke the record for the most wins in an NBA season.  Curry helped the Warriors return to the NBA Finals for a third straight year in 2017, where he won his second NBA championship.

Sam Mitchell (basketball): Samuel E. Mitchell Jr. (born September 2, 1963) is a former professional basketball player and coach who is currently head coach of the U.S. Virgin Islands national basketball team.  He was most recently the interim head coach for the Minnesota Timberwolves of the National Basketball Association (NBA).  He was also the head coach for the Toronto Raptors of the National Basketball Association (NBA) from 2004 to 2008.  Mitchell has also done analyst work for TSN and NBA TV as well as radio work for WHAL-AM in Columbus and WZGC-FM "92.9 The Game" in Atlanta.  He also currently works as a talk show co-host/analyst on SiriusXM NBA Radio.

Reggie Witherspoon (basketball): Phillip Reginald "Reggie" Witherspoon (born February 21, 1961) is the head coach of the Canisius College men's basketball team and the former head coach of the University at Buffalo men's college basketball team.  He was fired after the 2012-13 season.  He was the head coach at Erie Community College, and head coach and assistant coach at Sweet Home High School before he was hired as the interim head coach at Buffalo in December 1999.  Witherspoon was named full-time head coach on March 10, 2000.  He was the first African American named head coach of a varsity sports team in any Western New York suburban school district.  Witherspoon served one season as an assistant at Alabama under head coach Anthony Grant.  In 2015, Witherspoon was let go by Alabama when Grant was replaced by Avery Johnson.  He was subsequently named as an assistant on Matt McCall's staff at UT-Chattanooga.

Brian Earl: Brian W. Earl is an American professional basketball head coach and former professional basketball player and assistant coach.  He is the current head coach for the Cornell Big Red men's basketball team.  He previously served nine seasons as an assistant coach for Princeton Tigers men's basketball where he had formerly been team captain and earned three Ivy League championships.

Michael Curry: Michael Edward Curry (born August 22, 1968) is an American retired professional basketball player, and current coach of the Florida Atlantic Owls men's basketball team.  Curry played in the NBA from 1993 to 2005.  He later served as head coach of the Detroit Pistons.

Chris Gatling: Chris Raymond Gatling (born September 3, 1967) is a retired American professional basketball player born in Elizabeth, New Jersey.  Gatling played for many NBA teams from 1991 to 2002.  He played for the US national team in the 1990 FIBA World Championship, winning the bronze medal.

Mike D'Antoni: Michael Andrew D'Antoni (born May 8, 1951) is an American-Italian professional basketball coach who was formerly a professional basketball player.  He is currently the head coach of the Houston Rockets of the National Basketball Association (NBA).  While head coach of the NBA's Phoenix Suns, he won NBA Coach of the Year honors for the 2004–05 NBA season after the Suns posted 33 more wins than the previous season.  He coached the New York Knicks starting in 2008 before resigning in 2012.  He was hired by the Lakers after seven games into the 2012–13 season.  D'Antoni, who holds American and Italian dual citizenship, is known for favoring a fast-paced, offense-oriented system.  On June 1, 2016, D'Antoni was named as the new head coach for the Houston Rockets.

List of Philadelphia 76ers head coaches: The Philadelphia 76ers are an American professional basketball team based in Philadelphia, Pennsylvania.  They are a member of the Atlantic Division of the Eastern Conference in the National Basketball Association (NBA).  Formerly known as the Syracuse Nationals, the 76ers joined the NBA when it was founded in 1949.  The Nationals had a record of 51–13 in their first NBA season under coach Al Cervi and won the Eastern Division crown.  The franchise were purchased by Philadelphian Irv Kosloff and Ike Richma in the spring of 1963; the NBA approved their franchise shift on May 22 and name change to the Philadelphia 76ers on August 6.  This brought professional basketball back to the city, which had been without a team since the Golden State Warriors left Philadelphia in 1962.  After coaching the 76ers since , Doug Collins resigned as head coach on April 18, 2013 following the 2012–13 season.  Brett Brown was hired to be the head coach of the 76ers on August 15, 2013 prior to the start of the 2013-14 season.

History of the Miami Heat: The Miami Heat is an American professional basketball team based in Miami.  The team was launched in 1988 and played in the 1988–89 season of the National Basketball Association.  The next season they moved from the Western Conference to the Atlantic Division of the Eastern Conference.  After a mainly mediocre performance in the first few seasons, there were extensive team changes in 1995 and 1996 under head coach Pat Riley, including the recruitment of Isaac Austin and P.J. Brown.  They reached the Eastern Conference Finals for the first time in 1996–97.  They did not reach this level again until 2004–05, under new head coach Stan Van Gundy and with Dwyane Wade as a leading team member.  At this time they transferred to the Southeast Division.  The next year the team won the NBA Finals, defeating the Dallas Mavericks.  The head coach position was next taken by Erik Spoelstra.  Their next successful season was 2010–11, when they reached the NBA Finals again, losing to the Mavericks.  Acquiring LeBron James as a player, they won the Finals in both 2012 and 2013, and won 27 successive games in February–March 2013.  In 2013–14 they reached the Finals again but lost to San Antonio Spurs.  James left the team in July 2014, and the 2014–15 season was less successful.

Supporting paragraphs: Michael Curry Detroit Pistons
Answer: three