Question: Are Harry Keller and Marc Webb both ffilm directors?

Context articles: TimeTripper
500 Days of Summer
Tarnished
Marc Webb
Gifted (film)
Battleground (TV series)
Colorado College
Harry Keller
The Amazing Spider-Man 2
The Only Living Boy in New York (film)

TimeTripper is a series of science fiction books by Stefan Petrucha following Harry Keller, a teenager who can see time itself and his love interest Siara Warner, who helps him through some tough situations.
 Harry, not always aware of the significance of events, travels between linear time and A-Time to fix the outcome of events in the lives of others.
500 Days of Summer (stylized as (500) Days of Summer) is a 2009 American romantic comedy-drama film directed by Marc Webb from a screenplay written by Scott Neustadter and Michael H. Weber, and produced by Mark Waters.
 The film stars Joseph Gordon-Levitt and Zooey Deschanel, and employs a nonlinear narrative structure, with the story based upon its male protagonist and his memories of a failed relationship.
Tarnished is a 1950 American action film directed by Harry Keller and written by John K. Butler.
 The film stars Dorothy Patrick, Arthur Franz, Barbra Fuller, Jimmy Lydon, Harry Shannon and Don Beddoe.
 The film was released on February 28, 1950, by Republic Pictures.
Marc Preston Webb (born August 31, 1974) is an American music video, short film, and film director.
 He made his feature film directorial debut with the 2009 romantic comedy-drama "(500) Days of Summer", and went on to direct the 2012 "Spider-Man" reboot "The Amazing Spider-Man", its 2014 sequel, "The Amazing Spider-Man 2", and the 2017 comedy-drama films "Gifted" and "The Only Living Boy in New York".
Gifted is a 2017 American drama film directed by Marc Webb and written by Tom Flynn.
 It stars Chris Evans, Mckenna Grace, Lindsay Duncan, Jenny Slate, and Octavia Spencer.
 The plot follows an intellectually gifted 7-year-old who becomes the subject of a custody battle between her uncle and grandmother.
 The film was released on April 7, 2017, by Fox Searchlight Pictures, and grossed $39.6 million worldwide.
Battleground is a mockumentary comedy-drama web series created by J. D. Walsh streamed on Hulu.
 The show follows a group of political campaign staffers working to elect a dark horse candidate to the U.S. Senate in the battleground state of Wisconsin.
 Walsh serves as executive producer alongside Hagai Shaham and Marc Webb.
The Colorado College (CC) is a private liberal arts college in Colorado Springs, Colorado, United States, near the foot of the Rocky Mountains.
 It was founded in 1874 by Thomas Nelson Haskell in his daughter's memory.
 The college enrolls approximately 2,000 undergraduates at its 90 acre campus, 70 mi south of Denver.
 The college offers 42 majors and 33 minors, and has a student-faculty ratio of 10:1.
 Famous alumni include James Heckman, Ken Salazar, Lynne Cheney, Thomas Hornsby Ferril, Marc Webb, and Steve Sabol.
 Colorado College had an acceptance rate of 15% for the Class of 2021, was ranked as the best private college in Colorado by Forbes, and was listed as tied for the 23rd-best National Liberal Arts College, and as the No. 1 Most Innovative Liberal Arts School, in the 2018 "U.S. News & World Report" rankings.
Harry Keller (22 February 1913 – 19 January 1987) was an American film editor, producer and director, who made a number of westerns and worked for many years at Universal Pictures.
 He is perhaps best remembered today for shooting additional footage on "Touch of Evil" (1958).
The Amazing Spider-Man 2 (also released as The Amazing Spider-Man 2: Rise of Electro in some markets) is a 2014 American superhero film featuring the Marvel Comics character Spider-Man.
 The film was directed by Marc Webb and was produced by Avi Arad and Matt Tolmach.
 It is the fifth theatrical "Spider-Man" film produced by Columbia Pictures and Marvel Entertainment, and is the sequel to 2012's "The Amazing Spider-Man", it is also the final film in "The Amazing Spider-Man" franchise.
 The studio hired James Vanderbilt to write the screenplay and Alex Kurtzman and Roberto Orci to rewrite it.
 The film stars Andrew Garfield as Peter Parker / Spider-Man, Emma Stone as Gwen Stacy, Dane DeHaan as Green Goblin / Harry Osborn, Campbell Scott and Embeth Davidtz as Peter's parents, and Sally Field as Aunt May, with the addition of a new cast including Paul Giamatti as Rhino / Aleksei Sytsevich and Jamie Foxx as Electro / Max Dillon.
The Only Living Boy in New York is a 2017 American drama film directed by Marc Webb and written by Allan Loeb.
 The film stars Callum Turner, Kate Beckinsale, Pierce Brosnan, Cynthia Nixon and Jeff Bridges.
 The film was released on August 11, 2017, by Roadside Attractions and Amazon Studios.