Question: What did Krishnan–Panju and Billy Bob Thornton have in common?

Context paragraphs:
Chrystal (film): Chrystal is an American drama film, which was released to audiences in the United States on April 8, 2005.  The cast included Billy Bob Thornton, Lisa Blount, Harry Lennix, Walton Goggins, and Grace Zabriskie.  Ray McKinnon, in addition to playing the role of "Snake", directed, wrote, and produced the film.  The story is about a woman named Chrystal (Lisa Blount) who has been traumatized both physically and mentally from a car accident that took the life of her son.  Joe (Billy Bob Thornton), Chrystal's husband, has just been released from jail after a 16-year sentence stemming from multiple crimes he committed.

Some Folks Call It a Sling Blade: Some Folks Call It a Sling Blade is a short film written by Billy Bob Thornton, directed by George Hickenlooper and starring Thornton, Molly Ringwald, and J. T. Walsh.

Krishnan–Panju: R. Krishnan (1909–1997) and S. Panju (1915–1984), collectively referred to as Krishnan–Panju, were Indian filmmakers.  The duo directed more than 50 films in South Indian languages and in Hindi.

Billy Bob Thornton: William Robert "Billy Bob" Thornton (born August 4, 1955) is an American actor, filmmaker, singer, songwriter, and musician.

A Simple Plan (film): A Simple Plan is a 1998 American neo-noir crime thriller film adapted by Scott B. Smith from his 1993 novel of the same name.  Directed by Sam Raimi, it stars Bill Paxton, Billy Bob Thornton and Bridget Fonda.  Set in rural Minnesota, "A Simple Plan" follows brothers Hank (Paxton) and Jacob Mitchell (Thornton), who, along with Jacob's friend Lou (Brent Briscoe), discover a crashed plane containing $4.4 million in cash.  The three men go to great lengths to keep the money a secret but begin to doubt each other's trust, resulting in lies, deceit and murder.

Daddy and Them: Daddy and Them is a 2001 American film written, directed by, and starring Billy Bob Thornton.  In addition to Thornton, it stars Laura Dern, Andy Griffith, Ben Affleck, Kelly Preston, Diane Ladd, Brenda Blethyn, Tuesday Knight, Jamie Lee Curtis and Jim Varney.  This was Jim Varney's last live-action film; he died a year before the movie's release.  It was also his penultimate movie.

The Gift (2000 film): The Gift is a 2000 American supernatural thriller film directed by Sam Raimi, written by Billy Bob Thornton and Tom Epperson and based on the alleged psychic experiences of Thornton's mother.

Sling Blade (film): Sling Blade is a 1996 American drama film set in rural Arkansas, written and directed by Billy Bob Thornton, who also stars in the lead role.  It tells the story of a man named Karl Childers who has a developmental disability and is released from a psychiatric hospital, where he has lived since killing his mother and her lover when he was 12 years old, and the friendship he develops with a young boy and his mother.  In addition to Thornton, it stars Dwight Yoakam, J. T. Walsh, John Ritter, Lucas Black, Natalie Canerday, James Hampton, and Robert Duvall.

Bandits (2001 film): Bandits is a 2001 American criminal comedy-drama film directed by Barry Levinson.  It stars Bruce Willis, Billy Bob Thornton, and Cate Blanchett.  Filming began in October 2000 and ended in February 2001.  It helped Thornton earn a National Board of Review Best Actor Award for 2001.  Thornton and Blanchett's performances earned praise, as each was nominated for Best Actor and Best Actress Golden Globe Awards for their performances in this film, while Blanchett was nominated for Best Supporting Actress at the Screen Actors Guild Awards.  It first opened in theaters on October 12, 2001.

Jayne Mansfield's Car: Jayne Mansfield's Car is a 2012 drama film directed by Billy Bob Thornton, marking his first directing job since 2001's "Daddy and Them".  Thornton also stars alongside Robert Duvall, John Hurt, Kevin Bacon, Ray Stevenson, Frances O'Connor, Ron White, and Robert Patrick. <ref name="http://www.deadline.com/2011/06/billy-bob-thornton-sets-cast-funding-for-first-directing-effort-in-decade/"> </ref> The film had its world premiere at the 62nd Berlin International Film Festival in February 2012.  The film was released in limited release on September 13, 2013.

Supporting paragraphs: Krishnan–Panju Billy Bob Thornton
Answer: filmmaker