Question: What Eastern Conference NBA team won the championship round of the 58th season of the National Basketball Association?

Context paragraphs:
1998 NBA Finals: The 1998 NBA Finals was the championship round of the 1998 playoffs of the National Basketball Association (NBA) and the conclusion of the 1997–98 NBA season.  The Eastern Conference champion Chicago Bulls played against the Western Conference champion Utah Jazz, with the Jazz holding home-court advantage with the first 2 games in Salt Lake City.  In a repeat of the previous year's Finals, the Bulls won the series 4 games to 2 for their third consecutive NBA title and their sixth in eight seasons.  Michael Jordan was voted the NBA Finals MVP of the series (he also had won the award the last five times the Bulls won the Finals: 1991, 1992, 1993, 1996, and 1997).  This would be his sixth NBA championship and sixth Finals MVP award in six full basketball seasons.  Until 2014, it was the last consecutive Finals rematch between two teams.

2003–04 NBA season: The 2003–04 NBA season was the 58th season of the National Basketball Association.  The season ended with the Detroit Pistons defeating the Los Angeles Lakers 4-1 in the 2004 NBA Finals.

2005–06 Detroit Pistons season: The 2005–06 Detroit Pistons season was the 65th season of the franchise, the 58th in the National Basketball Association (NBA), and the 49th in the Detroit area.  They Pistons began the season hoping to improve upon their 54–28 output from the previous season and have another chance of going to the NBA Finals after losing to the San Antonio Spurs in last season's NBA Finals in seven games.  They bested it by ten games, finishing 64–18—their best record in franchise history—and qualifying for the playoffs for the fifth straight season.  The Pistons defeated the Milwaukee Bucks in five games in the first round, and the Cleveland Cavaliers in a tough hard fought seven game series to reached the Eastern Conference Finals for the fourth consecutive year before losing to the eventual NBA champions Miami Heat, whom they had beaten in a seven-game playoff series the year before.  Detroit's offseason was soon marked by the departure of star defensive player Ben Wallace, who signed a free-agent deal with the Chicago Bulls.

2004 NBA Finals: The 2004 NBA Finals was the championship round of the 2003–04 National Basketball Association season.  The Finals were between the Los Angeles Lakers of the Western Conference and the Detroit Pistons of the Eastern Conference; the Lakers held home court advantage.  The series was played under a best-of-seven format, so the first team to collect four game victories would win the series.

2011 NBA Finals: The 2011 NBA Finals was the championship series of the National Basketball Association (NBA)'s 2010–11 season, and the conclusion of the season's playoffs.  The Western Conference champion Dallas Mavericks defeated the Eastern Conference champion Miami Heat 4 games to 2 to win their first NBA championship.  Dallas became the last NBA team from Texas to win its first title, after the Houston Rockets won back-to-back titles in and , and the San Antonio Spurs won four NBA championships in , , and , and a fifth one subsequently in ; all three Texas NBA teams have now won at least one NBA championship.  It was also the first time in four years that the Los Angeles Lakers did not make the Finals, having been swept in the Western Conference semifinals by the eventual champion Dallas Mavericks.

1978 NBA Finals: The 1978 NBA World Championship Series was the championship round of the National Basketball Association (NBA)'s 1977–78 season, and the culmination of the season's playoffs.  The series featured the Western Conference champion Seattle SuperSonics against the Eastern Conference champion Washington Bullets.  The Bullets defeated the SuperSonics in seven games to win the NBA championship.  Bullets power forward/center Wes Unseld was named MVP of the series.  Before the Cleveland Cavaliers' Game 7 win at Golden State in the 2016 NBA Finals, this was the last time a road team had won Game 7 in the NBA Finals.  The 1978 Finals is the only NBA Finals series since the 1958 NBA Finals in which both teams had under 50 wins.  The 1979 Finals are the only NBA Finals to feature two teams with under 50 wins in an 82-game season.

2012–13 Miami Heat season: The 2012–13 Miami Heat season was the franchise's 25th season in the National Basketball Association (NBA).  They came into the season as the defending NBA champions, back-to-back Eastern Conference champions, the third season playing with the "Big Three" of Dwyane Wade, LeBron James, and Chris Bosh, and the fifth season under head coach Erik Spoelstra.  During the season, the Heat embarked on a 27-game winning streak, which still ranks as the 3rd longest winning streak in a single season in NBA history.  On June 3, 2013, the Heat defeated the Indiana Pacers in game seven of the Eastern Conference Finals to become the first team since the Chicago Bulls in 1998 to Three-peat as Eastern Conference champions.  The Heat then defeated the San Antonio Spurs in an NBA Finals that went the full seven games, handing the Spurs their very first loss in the NBA Finals, and with this victory in the NBA Finals, it echoed the 1997-98 Bulls as they had also been the last Eastern team to repeat as NBA champions.

2013–14 Miami Heat season: The 2013–14 Miami Heat season was the franchise's 26th season in the National Basketball Association (NBA).  They entered the season as two-time defending NBA champions (third overall), and three-time defending Eastern Conference champions, the fourth and final season playing with the "Big Three" of Dwyane Wade, LeBron James, and Chris Bosh, and the sixth season under head coach Erik Spoelstra.  In a rematch of the previous year's Eastern Conference Finals, the Heat defeated the Indiana Pacers in six games to become the first team to win four consecutive Eastern Conference championships since the 1986–87 Boston Celtics capped a Boston-dominant string going back to the 1983–84 season.  Miami's quest for a three-peat ended when the San Antonio Spurs, whom they would meet again in a rematch of last year's NBA Finals and defeated in seven games, won the NBA Finals by a 4–1 margin.  Following the season, LeBron left the Heat to rejoin the Cleveland Cavaliers.

1981 NBA Finals: The 1981 NBA World Championship Series was the championship round of the National Basketball Association (NBA)'s 1980–81 season, and the culmination of the season's playoffs.  It pitted the 62–20 Eastern Conference champion Boston Celtics against the 40–42 Western Conference champion Houston Rockets.  This series has the distinction of featuring for the third time in NBA history, and last to date, a team with a losing record in the Finals.  The previous team was the Minneapolis Lakers in 1959.  This Finals also has the biggest disparity between finalist records at 22 games (62–20 for the Celtics, 40–42 for the Rockets).

1986 NBA Finals: The 1986 NBA Finals was the championship round of the National Basketball Association (NBA)'s 1985–86 season, and the culmination of the season's playoffs.  It pitted the Eastern Conference champion Boston Celtics against the Western Conference champion Houston Rockets, in a rematch of the 1981 Finals (only Allen Leavell and Robert Reid remained from the Rockets' 1981 team).  It was the second and last NBA Championship Series of the 1980s not to feature the Los Angeles Lakers.

Supporting paragraphs: 2003–04 NBA season 2004 NBA Finals
Answer: Detroit Pistons