Question: What movie, filmed by Jeremiah S. Chechik, did John Mark Galecki appear in in 1989?
Context: John Mark is named in the Acts of the Apostles as an assistant accompanying Paul and Barnabas on their missionary journeys.  Traditionally he is regarded as identical with Mark the Evangelist. John Mark Nelson (born November 23, 1993) is a songwriter and producer based in Minneapolis, Minnesota.  John Mark Nelson quietly released his debut album "Still Here" in 2011.  His second release, "Waiting and Waiting", was released in August 2012.  In June 2014, Nelson released his third album, "Sings The Moon", thanks to a successful Kickstarter campaign that helped him fund the project.  His fourth full-length album, I'm Not Afraid, was released in September 2015 on GRNDWIRE Records. John Mark Gibson (born 31 January 1989) is a Scottish footballer who plays as a goalkeeper. National Lampoon's Christmas Vacation is a 1989 American Christmas comedy film directed by Jeremiah S. Chechik.  It is the third installment in National Lampoon's "Vacation" film series, and was written by John Hughes, based on his short story in "National Lampoon" magazine, "Christmas '59".  The film stars Chevy Chase, Beverly D'Angelo and Randy Quaid, with Juliette Lewis and Johnny Galecki as the Griswold children Audrey and Rusty, respectively. Mark the cousin of Barnabas is a character mentioned in the New Testament, usually identified with John Mark (and thus with Mark the Evangelist).  The opinion that this Mark is a different Mark is found in the writings of Hippolytus of Rome who thought them to be separate people. John Mark Galecki (born April 30, 1975) is an American actor.  He is known for playing David Healy in the ABC sitcom "Roseanne" from 1992 to 1997 and Dr. Leonard Hofstadter in the CBS sitcom "The Big Bang Theory" since 2007.  Galecki also appeared in the films "National Lampoon's Christmas Vacation" (1989), "Prancer" (1989), "Suicide Kings" (1997), "I Know What You Did Last Summer" (1997), "Bookies" (2003), and "In Time" (2011). John Mark Verdier House, also known as Lafayette Building, is a building in Beaufort, South Carolina.  It was built by John Mark Verdier, a French Huguenot, in 1804.  The house typified Beaufort's gracious antebellum architectural style.  It was a focal point of the town, a visible statement reflecting Verdier's significant wealth from trading indigo and growing sea island cotton. The John Mark Three-Decker is a historic triple decker at 24 Sigel Street in Worcester, Massachusetts.  It is a rare example in the city of the form executed in brick.  It was built in 1888 by John Mark, a mason who also lived in the building.  The front door is sheltered by an overhang supported by heavy brackets, which extends over a first floor bay section to the doors right.  There are bands of decorative brickwork between the floors. John Mark Redmond (known as Mark Redmond or J. Mark Redmond) is an Irish cardiothoracic surgeon and businessperson.  He is the brother of Professor Paul Redmond. The Avengers is a 1998 American action spy film adaptation of the British television series of the same name directed by Jeremiah Chechik.  It stars Ralph Fiennes and Uma Thurman as secret agents John Steed and Emma Peel, and Sean Connery as Sir August de Wynter, a mad scientist bent on controlling the world's weather.  Patrick Macnee, who played John Steed on the original series, makes a vocal cameo as the voice of Invisible Jones.  The film was a box office bomb, only grossing $48 million of its $60 million budget, and received generally negative reviews from critics, considering it as one of the worst films ever made.
Answer: National Lampoon's Christmas Vacation