Question: What type of publication does David Soren and Dav Pilke have in common?
Context: David Soren (born Howard David Soren on October 7, 1946) is an American archaeologist and former vaudeville performer. BPM 37093 (V886 Centauri) is a variable white dwarf star of the DAV, or ZZ Ceti, type, with a hydrogen atmosphere and an unusually high mass of approximately 1.1 times the Sun's.  It is about 50 light-years from Earth, in the constellation Centaurus, and vibrates; these pulsations cause its luminosity to vary.  Like other white dwarfs, BPM 37093 is thought to be composed primarily of carbon and oxygen, which are created by thermonuclear fusion of helium nuclei in the triple-alpha process. David Murray "Dav" Pilkey Jr. (born March 4, 1966) is an American author and illustrator of children's literature.  Pilkey is best known as the author and illustrator of the children's book series "Captain Underpants" and "Dumb Bunnies", the latter of which are written under the name Sue Denim. Captain Underpants: The First Epic Movie is a 2017 American computer-animated comedy film based on the children's novel series of the same name by Dav Pilkey.  It was produced by DreamWorks Animation and Scholastic Entertainment, with animation production provided by Mikros Image Montreal.  It was directed by David Soren from a screenplay by Nicholas Stoller, and stars the voices of Kevin Hart, Ed Helms, Thomas Middleditch, Nick Kroll, Jordan Peele, and Kristen Schaal.  The plot follows two imaginative elementary school pranksters named George Beard and Harold Hutchins (Hart and Middleditch) who hypnotize their mean-spirited principal, Mr. Krupp (Helms), into thinking he is Captain Underpants, a superhero who fights crime while wearing only underwear and a cape who George and Harold write comic books about. David Soren (born April 19, 1973) is a Canadian director, writer, voice actor, and storyboard artist at DreamWorks Animation.  His most notable work are TV specials based on the "Madagascar" film franchise, "Merry Madagascar", and "Madly Madagascar".  He directed the 2013 animated feature film "Turbo", which is based on his own original concept, as well as the 2017 animated film "" based on Dav Pilkey's "Captain Underpants" book series. HL Tau 76 is a variable white dwarf star of the DAV (or ZZ Ceti) type.  It was observed by G. Haro and W. J. Luyten in 1961, and was the first variable white dwarf discovered when, in 1968, Arlo U. Landolt found that it varied in brightness with a period of approximately 749.5 seconds, or 12.5 minutes.  Like other DAV white dwarfs, its variability arises from non-radial gravity wave pulsations within itself.  Later observation and analysis has found HL Tau 76 to pulsate in over 40 independent vibrational modes, with periods between 380 seconds and 1390 seconds. Ross 548 is a variable white dwarf star of the DAV type.  It was found to be variable in 1970; in 1972, it was given the variable star designation ZZ Ceti, which also refers to the entire class of DAV variable white dwarfs. Madly Madagascar is a direct-to-DVD Valentine's Day short film starring the characters from the "Madagascar" film series, and taking place during the film.  Produced by DreamWorks Animation, it was written and directed by David Soren.  The special was released on DVD on January 29, 2013.  Ben Stiller, Chris Rock, David Schwimmer and Jada Pinkett Smith returned to voice the main characters, except for Sacha Baron Cohen, who was replaced by Danny Jacobs. Turbo is a 2013 American 3D computer-animated comedy sports film produced by DreamWorks Animation and distributed by 20th Century Fox.  It is based on an original idea by David Soren, who also directed the film in his feature debut.  Set in Los Angeles, the film features an ordinary garden snail whose dream of becoming the world's fastest snail comes true.  The film was released on July 17, 2013.  The film stars the voices of Ryan Reynolds, Paul Giamatti, Michael Peña, Snoop Dogg, Maya Rudolph, Michelle Rodriguez and Samuel L. Jackson. A pulsating white dwarf is a white dwarf star whose luminosity varies due to non-radial gravity wave pulsations within itself.  Known types of pulsating white dwarfs include DAV, or ZZ Ceti, stars, with hydrogen-dominated atmospheres and the spectral type DA; DBV, or V777 Her, stars, with helium-dominated atmospheres and the spectral type DB; and GW Vir stars, with atmospheres dominated by helium, carbon, and oxygen, and the spectral type PG 1159.  (Some authors also include non-PG 1159 stars in the class of GW Vir stars.)  GW Vir stars may be subdivided into DOV and PNNV stars; they are not, strictly speaking, white dwarfs but "pre-white dwarfs" which have not yet reached the white dwarf region on the Hertzsprung-Russell diagram.  A subtype of DQV stars, with carbon-dominated atmospheres, has also been proposed., and in May 2012, the first extremely low mass variable (ELMV) white dwarf was reported.
Answer: book