Question: When is the opening day of the league that Jim Wilson plays for?

Knowledge 1: Jim Wilson (first baseman)
He was released by the Indians following the 1986 season. After a brief tour in the Minnesota Twins organization, Wilson signed as a free agent with the Seattle Mariners on March 1, 1988, playing five games for them in the 1989 season. [SEP] Knowledge 2: Cleveland Indians
The Cleveland Indians are an American professional baseball team based in Cleveland, Ohio. The Indians compete in Major League Baseball (MLB) as a member club of the American League (AL) Central division. Since , they have played at Progressive Field. The team's spring training facility is at Goodyear Ballpark in Goodyear, Arizona. Since their establishment as a major league franchise in 1901, the Indians have won two World Series championships: in 1920 and 1948, along with 10 Central Division titles and six American League pennants. The Indians' current World Series championship drought is the longest active drought among all 30 current Major League teams. [SEP] Knowledge 3: Opening Day
Major League Baseball had most of its teams open the 2011 season on a Thursday (March 31) or Friday (April 1) rather than the traditional Monday, in order to prevent the World Series from extending into November. Similarly, most teams opened the 2012 season on Thursday (April 5) or Friday (April 6). However, subsequent seasons through 2017 returned to Monday openers for most teams. For the 2018 season, all 30 teams were scheduled to open the season on Thursday, March 29 (the earliest domestic start for a regular season in MLB history, and the first time since 1968 that all major league teams were scheduled to start the season on the same day, although two games were subsequently rained out and postponed to Friday, March 30).
Knowledge 1: Jim Wilson (first baseman)
He was released by the Indians following the 1986 season. After a brief tour in the Minnesota Twins organization, Wilson signed as a free agent with the Seattle Mariners on March 1, 1988, playing five games for them in the 1989 season. [SEP] Knowledge 2: Baseball uniform
In 1916, the Cleveland Indians became the first team to add numbers on their uniforms, positioned on the left sleeve of the home uniforms only. (Okkonen, p. 36, p. 120) In 1929, numbers were first added on the backs of uniforms by the New York Yankees and the Cleveland Indians. By 1932, all major league baseball teams had numbers on their players' uniforms. The Brooklyn Dodgers, in 1952, became the first baseball team to add numbers to the fronts of their uniforms. In 1960, the Chicago White Sox were the first team to place players' names on the back of their jerseys, doing so on their road jerseys; within a few years, this practice became almost universal in MLB, though to this day the Yankees only wear names on their uniforms for Players Weekend, a yearly event where alternate uniforms with nicknames are used. [SEP] Knowledge 3: Opening Day
Major League Baseball had most of its teams open the 2011 season on a Thursday (March 31) or Friday (April 1) rather than the traditional Monday, in order to prevent the World Series from extending into November. Similarly, most teams opened the 2012 season on Thursday (April 5) or Friday (April 6). However, subsequent seasons through 2017 returned to Monday openers for most teams. For the 2018 season, all 30 teams were scheduled to open the season on Thursday, March 29 (the earliest domestic start for a regular season in MLB history, and the first time since 1968 that all major league teams were scheduled to start the season on the same day, although two games were subsequently rained out and postponed to Friday, March 30).
Knowledge 1: Jim Wilson (first baseman)
He was released by the Indians following the 1986 season. After a brief tour in the Minnesota Twins organization, Wilson signed as a free agent with the Seattle Mariners on March 1, 1988, playing five games for them in the 1989 season. [SEP] Knowledge 2: Cleveland Indians
The Cleveland Indians are an American professional baseball team based in Cleveland, Ohio. The Indians compete in Major League Baseball (MLB) as a member club of the American League (AL) Central division. Since , they have played at Progressive Field. The team's spring training facility is at Goodyear Ballpark in Goodyear, Arizona. Since their establishment as a major league franchise in 1901, the Indians have won two World Series championships: in 1920 and 1948, along with 10 Central Division titles and six American League pennants. The Indians' current World Series championship drought is the longest active drought among all 30 current Major League teams. [SEP] Knowledge 3: Major League Baseball schedule
The Major League Baseball (MLB) season schedule consists of 162 games for each of the 30 teams in the American League (AL) and National League (NL), played over approximately six months -- a total of 2,430 games, plus the postseason. The regular season runs from late March / early April to late September / early October, followed by the postseason which can run to early November. The season begins with the official Opening Day, and, as of 2018, runs 261⁄2 weeks through the last Sunday of September or first Sunday of October. One or more International Opener games may be scheduled outside the United States before the official Opening Day. It is possible for a given team to play a maximum of 20 games in the postseason in a given year, provided the team is a wild card and advances to each of the Division Series, Championship Series, and World Series with each series going the distance (5 games in the Division Series, 7 games in the League Championship Series / World Series).

Answer: Thursday, March 29