Question: Craig Serling and Jeff Celentano, are of which nationality?

Context paragraphs:
Craig Serling: Craig Serling is an American film director, film producer, screenwriter, and television editor known for multiple Primetime Emmy nominations for 'Outstanding Picture Editing for Non-Fiction Programming' and for his 2006 directorial debut feature film "Jam".

Craig Veasey: Craig Veasey (born December 25, 1966 in Houston, Texas) is a retired defensive tackle/nose tackle in the NFL.  While attending the University of Houston from 1985 to 1989, Craig earned was a 4-year letterman, and a starting 3 of those years.  In 1989 as a senior at the University of Houston, he earned the honor of USA Today All-American from the defensive end position for his 17 sacks and 93 tackles.  After being selected in the 81 position in the 1990 NFL draft, he played for the Pittsburgh Steelers under Chuck Noll, the Miami Dolphins under Don Shula, and under the Houston Oilers for coaches Jack Pardee and Jeff Fisher.  He retired from the Houston Oilers after the 1995 Season

Breaking Point (2009 film): Breaking Point is a 2009 action-drama film starring Tom Berenger, Busta Rhymes, Musetta Vander and Sticky Fingaz.  It is directed by Jeff Celentano with a screenplay written by Vincent Campanella.  The film was showcased in Cannes and was released theatrically on December 4, 2009.

Gunshy: Gunshy is an American 1998 crime drama film directed by Jeff Celentano and starring William Petersen, Michael Wincott, and Diane Lane.

Under the Hula Moon: Under the Hula Moon is an action comedy film from 1995 directed by Jeff Celentano.  It features the talents of Stephen Baldwin, Emily Lloyd, Chris Penn, and Musetta Vander.

Jeff Celentano: Jeff Celentano (born May 24, 1960), also credited as Jeff Weston, is an American actor, screenwriter, and director.  As a character actor, Celentano has starred in such films as "", "Puppet Master II", and "Demonic Toys".  In 1994, he turned to directing with his first short film, "Dickwad".  He also directed "Under the Hula Moon", "Gunshy", and most recently "Moscow Heat".  Celentano is an acting teacher and is the Executive Director of Drama at The Performer's Academy in Laguna Woods, California.  Celentano was born and raised in Pemberton, New Jersey.  He has been married to the actress Musetta Vander since 1988.

Primary Suspect: Primary Suspect is a 2000 American action-thriller-mystery film written by D.Alvelo and Marc Bienstock and directed by Jeff Celentano.  The film stars William Baldwin, Brigitte Bako, and Lee Majors.

Craig Smajstrla: Craig Smajstrla (pronounced: Suh-ma-struh-luh), (born June 19, 1962 in Houston, Texas), was a Major League Baseball player with the Houston Astros baseball club in 1988.  A native of the Houston area, he only had three at-bats in his entire big league career and never recorded a hit or walk, but did reach base several times as a pinch runner.  He tied a record set by many who have appeared in the Majors and yet never recorded a hit.  His Astros record was broken in 1990 when Jeff Baldwin went 0 for 7 in his career.  Smajstrla was nicknamed "Mr. Buy A Vowel" by Astros broadcaster Milo Hamilton.  He was one of only three Houston natives on the '88 Astros roster (the others were Craig Reynolds and Steve Henderson).  Smajstrla was also known for being one of the smallest players in baseball as he was only 5'9" tall and weighed 165 lbs.

Jam (film): Jam (or Jam: When Lives Collide) is a 2006 drama film directed by Craig E. Serling.  Written by Serling and Nicole Lonner, the film was executive produced by Dianne Burnett for Burnett Entertainment in association with Thanksgiving Films.  As Serling's first feature length project, "Jam" is based upon a short film by the same name that Serling shot in 2004.  Starring Elizabeth Bogush, Dan Byrd, Julie Claire, and David DeLuise, "Jam" premiered at the Vail Film Festival on April 1, 2006, aired on television on the Starz!  TV channel, and was released on DVD on July 3, 2007, by the Starz!  distribution branch of Anchor Bay Entertainment.

Moscow Heat: Moscow Heat (Russian: Московская жара ) is a 2004 Russian action film directed by Jeff Celentano.

Supporting paragraphs: Craig Serling Jeff Celentano
Answer: American