Question: Which airline founded by Frank Lorenzo was affected by a strike in 1989?

Context paragraphs:
1988 Writers Guild of America strike: The 1988 Writers Guild of America strike was a strike action taken by members of both the Writers Guild of America, East (WGAE) and the Writers Guild of America, West (WGAW) against major United States television and film studios represented by the Alliance of Motion Picture and Television Producers (AMPTP).  The strike, which ran from March 7 to August 7, 1988, affected production on movies and TV shows.  At 155 days, it remains the longest strike in the Guild's history, surpassing the 1960 Writers Guild of America strike by one week and the 2007-2008 Writers Guild of America strike by seven weeks.

Charlie Bryan: Charlie Bryan (11 December 1933 - 2 November 2013) was the head of the International Association of Machinists union in the southeast United States, during the mid to late 1980s.  He led machinists to strike against Eastern Air Lines and Frank Lorenzo in 1989.

Midway Airlines (1976–1991): Midway Airlines was a United States airline founded on August 6, 1976, by investor Kenneth t. Carlson and joined by Irving T. Tague and William B. Owens in an October 13, 1976, filing with the Civil Aeronautics Board (CA) for an airline operating certificate.  Although it received its operating certificate from the CAB prior to the passage of the Airline Deregulation Act in 1978, it is widely recognized as the first post-deregulation start-up.  The airline commenced operations on October 31, 1979.

2008 National Union of Teachers strike: The NUT teacher strike was a 24-hour strike by teachers on 24 April 2008, over the issue of pay.  It was the largest strike in Britain for more than 20 years.  It is also believed that up to 8000 schools were affected by this strike.There was also a strike by the UCU, which is the teachers' trade union for further education, with over 1000 members of the UCU joining a march in London

2005 New York City transit strike: The 2005 New York City transit strike was a strike in New York City called by the Transport Workers Union Local 100 (TWU).  Negotiations for a new contract with the Metropolitan Transportation Authority (MTA) broke down over retirement, pension, and wage increases.  The strike began at 3:00 a.m. EST on December 20, 2005.  Most New York City Transit Authority and MTA Bus Company personnel observed the strike, effectively halting all service on the subway and buses, except for routes operated from the Spring Creek Depot, where workers represented by ATU Local 1181/1061 had a contract in force after striking against the predecessor operator, Command Bus Company, the previous year.  Millions of commuters were affected.  The strike officially ended at 2:35 p.m. EST on December 22, 2005.  Service was restored overnight, with all transportation systems fully operational by the morning commute of the 23rd.

Frank Lorenzo: Francisco Anthony "Frank" Lorenzo (born May 19, 1940) is an American businessman and philanthropist.  He is most famous for his leadership of Texas International Airlines and its successor holding company Texas Air Corporation between 1972 and 1990, through which he formed or acquired a number of major U.S. airlines including Continental Airlines, Eastern Air Lines, Frontier Airlines, New York Air and People Express Airlines.

1905 Chicago teamsters' strike: The 1905 Chicago Teamsters' strike was a sympathy strike and lockout by the United Brotherhood of Teamsters in the summer of 1905 in the city of Chicago, Illinois.  The strike was initiated by a small clothing workers' union.  But it soon spread as nearly every union in the city, including the Teamsters, supported the job action with sympathy strikes.  Initially, the strike was aimed at the Montgomery Ward department store, but it affected almost every employer in the metropolitan region after the Teamsters walked out.  The strike eventually pitted the Teamsters against the Employers' Association of Chicago, a broad coalition of business owners formed a few years earlier to oppose unionization in Chicago.

Ryan Airline Company: Ryan Airline Company was an airline founded by T. Claude Ryan and Benjamin Franklin "Frank" Mahoney at San Diego, California on April 19, 1925.  They had earlier established a scheduled service between San Diego and Los Angeles with a fare of $14.50 one-way and $22.50 round-trip.

Little Steel strike: The Little Steel strike was a 1937 labor strike by the Congress of Industrial Organizations (CIO) and its branch the Steel Workers Organizing Committee (SWOC), against a number of smaller steel producing companies, principally Republic Steel, Inland Steel, and Youngstown Sheet and Tube Company.  The strike affected a total of thirty different mills belonging to the three companies, which employed 80,000 workers.  The strike, which was one of the most violent labor disputes of the 1930s, ended without the strikers achieving their principal goal, recognition by the companies of the union as the bargaining agent for the workers.

Battle of the Viaduct: The Battle of the Viaduct was an event that took place in Chicago due to a much larger and more prolific event, the Great Railroad Strike of 1877.  The strike began on July 14, 1877 in Virginia, during a time of great economic woe throughout the country, thus it quickly gained momentum, eventually becoming the first national strike in United States' History.  The city of Chicago was quickly affected by the strike.  Being one of the most heavily populated cities in America at the time, crowds gathered in extreme numbers to partake in the upheaval.  One specific area, the Halsted Street viaduct, saw a huge number of people gather and protest.  They began to get violent, and in return they were met by fierce retaliation from the authorities.  The conflict that ensued between the two sides quickly turned bloody, and the event that took place became known as the Battle of the Viaduct.

Supporting paragraphs: Charlie Bryan Frank Lorenzo
Answer: International Association of Machinists