Question: What date did the Major League Baseball draft, in which Alex Lange was drafted by the Chicago Cubs, begin?

Context paragraphs:
Nate Teut: Nathan Mark Teut (pronounced "TOYT") (born March 11, 1976) is a former Major League Baseball pitcher who played for the Florida Marlins in .  He was drafted in the 4th round of the 1997 Major League Baseball Draft by the Chicago Cubs.  Neut spent one year each in the Marlins and Milwaukee Brewers organizations, but spent most of his career in the Cubs organization.

2017 Major League Baseball draft: The 2017 Major League Baseball (MLB) First-Year Player Draft began on June 12, 2017.  The draft assigned amateur baseball players to MLB teams.  The first 36 picks, including the first round and compensatory picks, were broadcast on MLB Network on June 12, while the remainder of the draft was live streamed on MLB.com on June 13 and 14.

Tom Lundstedt: Thomas Robert Lundstedt (born April 10, 1949), is a former professional baseball player who played in the Major Leagues primarily as a catcher from 1973 to 1975.  He played at Prospect High School in Mt. Prospect, Illinois and the University of Michigan.  He was originally drafted by the Los Angeles Dodgers in the 65th round of the 1967 Major League Baseball Draft but did not sign.  He was later drafted by the Chicago Cubs in the 1st round of the 1970 Major League Baseball Draft and signed on June 9, 1970.  After playing in 26 games in two seasons with the Cubs, he was traded to the Minnesota Twins on December 6, 1974 in exchange for Mike Adams.  He played in 18 games with the Twins in 1975.

Mark Pawelek: Mark W. Pawelek (born August 18, 1986) is a professional baseball pitcher.  He was drafted by the Chicago Cubs in the 1st round (20th overall pick) round of the 2005 Major League Baseball Draft.  Pawelek attended Springville High School and signed with the Cubs and received a $1.75 million signing bonus instead of accepting a scholarship offer to play college baseball at Arizona State University.  He played in the Cubs minor league system from 2005 to 2009, and never reached the major leagues.  In 2010, he played independent baseball for the Gateway Grizzlies of the Frontier League.  Pawelek played for Team Netherlands in the 2013 World Baseball Classic.

Alex Gonzalez (shortstop, born 1973): Alexander Scott Gonzalez (born April 8, 1973) is a former Major League Baseball infielder, who spent the majority of his 13-year career with the Toronto Blue Jays.  Gonzalez established a career-high with 20 home runs for the Chicago Cubs in 2003 and hit 20 or more doubles eight times.  He was regarded as a glove-first player, sporting lower-than-average batting average (career .243 hitter), on-base percentage (.302), and OPS (.694) while leading the American league twice in fielding percentage.  At Killian High School in Miami, Florida, Gonzalez was an All-State pick in baseball as a senior.  He was drafted straight out of high school in the 14th round of the 1991 Major League Baseball Draft by the Blue Jays.  He is Cuban-American and was nicknamed "Gonzo" in order to tell the difference between him and the other Alex Gonzalez, who signed with the Blue Jays on November 26, 2009.

Scott May (baseball): Scott Francis May (born November 11, 1961) is a former Major League Baseball pitcher.  May was originally drafted in the sixth round of the 1983 Major League Baseball Draft by the Los Angeles Dodgers.  In 1987, he was traded to the Texas Rangers for Javier Ortiz.  He played at the Major League level with the Rangers in 1988.  The following year, he was traded along with minor league player Mike Wilson to the Milwaukee Brewers for La Vel Freeman and minor league player Todd Simmons.  Later in his career, he signed with the Chicago Cubs and played at the Major League level with the team in 1991.

Jason Dubois: Jason Bradford Dubois (born March 26, 1979) is a former Major League Baseball outfielder who played for the Chicago Cubs and the Cleveland Indians.  He was drafted by the Chicago Cubs in the 14th round of the 2000 Major League Baseball Draft.

Willie Prall: Wilfred Anthony Prall (born April 20, 1950) is a former Major League Baseball pitcher.  Prall was drafted by the San Francisco Giants in the third round of the 1971 Major League Baseball Draft, then was traded to the Chicago Cubs in 1974 in exchange for catcher Ken Rudolph.  Prall's major league career began and ended in with the Cubs, when he pitched in three games, winning none and losing two.

Mike Chris: Michael Chris (born October 8, 1957 in Santa Monica, California) is a former Major League Baseball pitcher who attended the West Los Angeles Junior College.  He appeared in games in three Major League seasons, starting approximately half of the games.  The Detroit Tigers drafted him with the 10th overall pick of the 1977 Major League Baseball Draft and promoted him to the majors in 1979 to pitch in 13 games, starting eight.  Chris finished with a record of three wins against three losses, with a 6.92 ERA.  The Tigers traded him to the San Francisco Giants in 1981 with Dan Schatzeder for Larry Herndon.  He pitched in part of two seasons for the Giants, but they placed him on waivers in 1983.  The Chicago Cubs claimed him, but he never pitched for the Cubs, and they released him in the offseason.

Alex Lange: Alex Craig Lange (born October 2, 1995) is a right-handed American baseball pitcher.  He played college baseball at Louisiana State University (LSU).  He was drafted by the Chicago Cubs with the 30th pick in the 1st round of 2017 Major League Baseball draft.

Supporting paragraphs: Alex Lange 2017 Major League Baseball draft
Answer: June 12, 2017