Question: in the 1979–80 NBA season, Philadelphia 76ers acquired a guard from the Portland Trail Blazers who has recently served as a head coach of which NBA team ?
Context: Steve Colter (born July 24, 1962) is a retired American professional basketball player who was selected by the Portland Trail Blazers in the second round (33rd overall) of the 1984 NBA draft.  A 6'3" guard from New Mexico State, Colter played in 8 NBA seasons for 6 different teams.  He played for the Trail Blazers, Chicago Bulls, Philadelphia 76ers, Washington Bullets, Sacramento Kings and Cleveland Cavaliers. Dana P. Pagett (born March 29, 1949) is a retired professional basketball player who spent one season in the American Basketball Association (ABA) as a member of the Virginia Squires during the 1971–72 season.  He attended University of Southern California where he was drafted by the Philadelphia 76ers during the eleventh round of the 1971 NBA Draft.  After that season he signed with the Portland Trail Blazers, but was released before the start of the 1972–73 National Basketball Association (NBA) season.  He was an assistant coach for the Loyola Marymount Lions, Long Beach State 49ers and Utah State Aggies men's basketball teams.  He was also the assistant coach for Rancho Santiago Community College District men's basketball team and was later promoted to the head coach position. The Portland Trail Blazers, commonly known as the Blazers, are an American professional basketball team based in Portland, Oregon.  They play in the Northwest Division of the Western Conference in the National Basketball Association (NBA).  The Trail Blazers originally played their home games in the Memorial Coliseum, before moving to the Rose Garden in 1995.  The franchise entered the league in 1970, and Portland has been its only home city.  The franchise has enjoyed a strong following; from 1977 through 1995, the team sold out 814 consecutive home games, the longest such streak in American major professional sports.  The Trail Blazers are the only team in the major professional North American sports leagues located in the state of Oregon.  The Trail Blazers are also currently the only NBA team based in the binational Pacific Northwest, after the Vancouver Grizzlies relocated to Memphis and became the Memphis Grizzlies in 2001, and the Seattle SuperSonics relocated to Oklahoma City and became the Oklahoma City Thunder in 2008. The 1997–98 NBA season was the 52nd season for the New York Knicks in the National Basketball Association.  During the offseason, the Knicks acquired Chris Mills from the Boston Celtics and Chris Dudley from the Portland Trail Blazers.  At midseason, they traded Herb Williams to the Philadelphia 76ers for Terry Cummings.  In the regular season, the Knicks had a 43–39 record, which placed them in a tie for second place in the Atlantic Division.  Despite their lowest winning percentage since the 1990–91 season, the team qualified for the NBA Playoffs as the #7 seed.  They also hosted the 1998 NBA All-Star Game. The 2015–16 Philadelphia 76ers season was the 77th season of the franchise in the National Basketball Association (NBA).  It was also the second straight season that Joel Embiid, their third pick in the 2014 NBA draft, would not suit up for the 76ers due to a leg injury.  Philadelphia broke the record for the longest losing streak in American professional sports history with 27 straight losses over this season and last season with a 114–116 loss to the Houston Rockets.  The losing streak would reach to 28 games (with the 18 straight losses tying the record for longest opening season losing streak with the 2009–10 New Jersey Nets) before getting their first victory at home against the Los Angeles Lakers, which was also Kobe Bryant's last game against the 76ers in Philadelphia.  Philadelphia would also hire former Phoenix Suns owner, coach, general manager, and four-time NBA Executive of the Year winner Jerry Colangelo on December 7, 2015 as their Chairman of Basketball Operations.  Eleven days later, former Denver Nuggets, Phoenix Suns, New York Knicks, and Los Angeles Lakers head coach Mike D'Antoni would join the team as an associate head coach.  Near the end of the season, general manager Sam Hinkie would announce his resignation from his position, being replaced by Jerry's son Bryan Colangelo before the end of the season.  Jerry would also announce his personal demotion from his original position afterwards.  They finished just one game shy of tying the NBA record for most losses in a season set by themselves during their 1972–73 season when they went 9–73.  However, it would be the season where Sam Hinkie's goal of "The Process" came into full fruition since they'd later earn the #1 selection in the 2016 NBA draft. 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. The 2000–01 NBA season was the Pacers' 25th season in the National Basketball Association, and 34th season as a franchise.  During the offseason, the Pacers hired former Indiana University and Detroit Pistons star Isiah Thomas as Head Coach, while acquiring Jermaine O'Neal from the Portland Trail Blazers.  With the departures of veteran players from the team that reached the Finals last year, the Pacers struggled playing mediocre basketball for most of the season, and finished fourth in the Central Division with a record of 41–41.  To qualify for the playoffs, the Pacers needed to win 9 of their final 11 games to secure the #8 seed in the Eastern Conference.  Last year's Most Improved Player Jalen Rose continued to lead the team in scoring averaging 20.5 points per game.  In the playoffs, the top-seeded Philadelphia 76ers would need only four games to eliminate the Pacers.  Following the season, Sam Perkins retired and Derrick McKey signed as a free agent with the Philadelphia 76ers. The 1973 NBA draft was the 27th annual draft of the National Basketball Association (NBA).  The draft was held on April 24 and May 5, 1973, before the 1973–74 season.  In this draft, 17 NBA teams took turns selecting amateur U.S. college basketball players and other eligible players, including international players.  The first two picks in the draft belonged to the teams that finished last in each conference, with the order determined by a coin flip.  The Philadelphia 76ers won the coin flip and were awarded the first overall pick, while the Portland Trail Blazers were awarded the second pick.  The remaining first-round picks and the subsequent rounds were assigned to teams in reverse order of their win–loss record in the previous season.  Prior to the draft, the Baltimore Bullets relocated to Landover, Maryland, and became the Capital Bullets.  The Philadelphia 76ers were awarded an extra first-round draft pick as compensation when the Seattle SuperSonics signed John Brisker.  A player who had finished his four-year college eligibility was eligible for selection.  If a player left college early, he would not be eligible for selection until his college class graduated.  Before the draft, 11 college underclassmen were declared eligible for selection under the "hardship" rule.  These players had applied and gave evidence of financial hardship to the league, which granted them the right to start earning their living by starting their professional careers earlier.  The draft consisted of 20 rounds comprising the selection of 211 players. The 1979–1980 Philadelphia 76ers season was the 76ers 31st season in the National Basketball Association (NBA) and 17th season in Philadelphia.  They finished with a record of 59–23, their best since the 1967–68 season.  The team had acquired guard Lionel Hollins from the Portland Trail Blazers after their effort to obtain Pete Maravich failed as he signed with the Boston Celtics.  In the playoffs, they won the 1980 Eastern Conference Championship over the Boston Celtics 4–1.  In the 1980 NBA Finals they would lose to the Los Angeles Lakers 4–2.  The series was memorable for Julius Erving's baseline move in Game 4, and Magic Johnson's 42-point effort in Game 6 starting the game at center in place of an injured Kareem Abdul-Jabbar. Lionel Eugene Hollins (born October 19, 1953) is an American basketball coach and former professional basketball player.  He most recently served as the head coach of the Brooklyn Nets of the National Basketball Association (NBA).
Answer: the Brooklyn Nets