Question: What form of theater do Sean Pol McGreevy and Mack and Mabel have in common?

Context articles: Mabel's Awful Mistakes
DNA polymerase I
Hello, Mabel
Sean Pol McGreevy
Sean McGreevy
Mabel Tainter Memorial Building
Mabel's Busy Day
MABEL (robot)
Mabel at the Wheel
Mack and Mabel

Mabel's Awful Mistakes is a 1913 film starring Mabel Normand and directed by Mack Sennett.
 The film also features Mack Sennett, Ford Sterling and Edgar Kennedy.
DNA polymerase I (or Pol I) is an enzyme that participates in the process of prokaryotic DNA replication.
 Discovered by Arthur Kornberg in 1956, it was the first known DNA polymerase (and, indeed, the first known of any kind of polymerase).
 It was initially characterized in "E. coli" and is ubiquitous in prokaryotes.
 In "E. coli" and many other bacteria, the gene that encodes Pol I is known as polA.
 The "E. coli" form of the enzyme is composed of 928 amino acids, and is an example of a processive enzyme—it can sequentially catalyze multiple polymerisations without releasing the single-stranded template.
 The physiological function of Pol I is mainly to repair any damage with DNA, but it also serves to connect Okazaki fragments by deleting RNA primers and replacing the strand with DNA.
Hello, Mabel (also known as On a Busy Wire) is a 1914 American short silent comedy film produced and directed by Mack Sennett and starring Mabel Normand.
 The supporting cast features Charley Chase, Al St. John, Minta Durfee, and Mack Swain.
Sean Pol McGreevy (born 11 January 1980) is an Irish actor, singer, composer and musical director best known for Musical Theatre and singing/playing piano in the West End of London.
 Notable roles include, Mark in Jonathan Larson's "Rent" 2000, Frank Capra in "Mack and Mabel" London 2008 and JJ Brown in "The Unsinkable Molly Brown" London 2009.
Sean McGreevy, born in Belfast, Northern Ireland, is a popular Gaelic footballer who has been the Antrim goalkeeper since making his Championship debut in 1993.
 McGreevy, a sales rep, made his debut against the then defending All-Ireland champions Donegal in front of 30,000 fans at Ballybofey, Co Donegal.
 He enjoyed an impressive first outing for Antrim, who narrowly lost to Brian McEniff's side by three points.
The Mabel Tainter Center for the Arts, originally named the Mabel Tainter Memorial Building and also known as the Mabel Tainter Theater, is a historic landmark in Menomonie, Wisconsin, and is registered on the U.S. National Register of Historic Places.
Mabel's Busy Day is a 1914 short comedy film starring Mabel Normand and Charles Chaplin; the film was also written and directed by Mabel Normand.
 The supporting cast includes Chester Conklin, Slim Summerville, Edgar Kennedy, Al St. John, Charley Chase, and Mack Sennett.
MABEL (robot) is a robot engineered in 2009 by researchers at the University of Michigan, which is well known for being the world's fastest bipedal (two-legged) robot with knees.
 MABEL is able to reach speeds of up to 3.6 m/s (6.8 mph).
 The name MABEL is an acronym for Michigan Anthropomorphic Biped With Electronic Legs.
 The creators include J.W. Grizzle, Jonathan Hurst, Hae-Won Park, Koushil Sreenath, and Alireza Ramezani.
 MABEL weighs 143 pounds (65 kilograms) with most of its weight being in the top torso area.
 The legs contain large springs and are jointed to form knees.
 The robot is attached to a safety boom for lateral stability.
Mabel at the Wheel is a 1914 American motion picture starring Charles Chaplin and Mabel Normand, and directed by Mabel Normand and Mack Sennett.
Mack and Mabel is a musical with a book by Michael Stewart and music and lyrics by Jerry Herman.
 The plot involves the tumultuous romantic relationship between Hollywood director Mack Sennett and Mabel Normand (transformed from an artist's model to a waitress from Flatbush, Brooklyn for the musical), who became one of his biggest stars.
 In a series of flashbacks, Sennett relates the glory days of Keystone Studios from 1911, when he discovered Normand and cast her in dozens of his early "two-reelers", through his creation of Sennett's Bathing Beauties and the Keystone Cops to Mabel's death from tuberculosis in 1930.