Question: Which actor is known for being in westerns, Anthony Mann or Luis Valdez?

Context paragraphs:
Los Vendidos: Los Vendidos (Spanish for The Sold Ones or The Sellouts) is a one-act play by Chicano playwright Luis Valdez, a founding member of El Teatro Campesino.  He wrote it in 1967, and it was first performed at the Brown Beret junta in Elysian Park, East Los Angeles.  The play examines stereotypes of Latinos in California and how they are treated by local, state, and federal governments.

The Far Country: The Far Country is a 1954 American Technicolor Western romance film directed by Anthony Mann and starring James Stewart, Ruth Roman, Walter Brennan and Corinne Calvet.  Written by Borden Chase, the film is about a self-minded adventurer who locks horns with an evil, crooked judge while driving cattle to Dawson.  It is one of the few Westerns, along with "The Spoilers" and "North to Alaska", to be set (not filmed) in Alaska.  This is the fourth Western film collaboration between Anthony Mann and James Stewart.

Winchester '73: Winchester '73 is a 1950 American Western film directed by Anthony Mann starring James Stewart, Shelley Winters, Dan Duryea and Stephen McNally.  Written by Borden Chase and Robert L. Richards, the film is about the journey of a prized rifle from one ill-fated owner to another and a cowboy's search for a murderous fugitive.  The movie features early film performances by Rock Hudson as an American Indian, Tony Curtis, and James Best.  The film received a Writers Guild of America Award nomination for Best Written American Western.  This is the first Western film collaboration between Anthony Mann and James Stewart.  It was filmed in black and white.

Zoot Suit (play): Zoot Suit is a play written by Luis Valdez, featuring incidental music by Daniel Valdez and Lalo Guerrero.  "Zoot Suit" is based on the Sleepy Lagoon murder trial and the Zoot Suit Riots.  Debuting in 1979, "Zoot Suit" was the first Chicano play on Broadway.  In 1981, Luis Valdez also directed a filmed version of the play, combining stage and film techniques.

Luis Valdez: Luis Valdez (born June 26, 1940) is an American playwright, actor, writer and film director.  Regarded as the father of Chicano theater in the United States, Valdez is best known for his play "Zoot Suit", his movie "La Bamba", and his creation of El Teatro Campesino.  A pioneer in the Chicano Movement, Valdez broadened the scope of theatre and arts of the Chicano community.

The Naked Spur: The Naked Spur is a 1953 Technicolor American Western film directed by Anthony Mann and starring James Stewart, Janet Leigh, and Robert Ryan.  Written by Sam Rolfe and Harold Jack Bloom, the film is about a bounty hunter who tries to bring a murderer to justice, and is forced to accept the help of two strangers who are less than trustworthy.  The original music score was composed by Bronislau Kaper and the cinematography was by William C. Mellor.  "The Naked Spur" was filmed on location in Durango and the San Juan Mountains in Colorado, and Lone Pine, California.  The film was nominated for an Academy Award for Best Original Screenplay—a rare honor for a Western.  This is the third Western film collaboration between Anthony Mann and James Stewart.

Bend of the River: Bend of the River is a 1952 American Technicolor Western film directed by Anthony Mann and starring James Stewart, Arthur Kennedy, Julie Adams, and Rock Hudson.  Based on the 1950 novel "Bend of the Snake" by Bill Gulick, the film is about a tough cowboy who risks his life to deliver confiscated supplies to homesteaders after gold is discovered in the region.  "Bend of the River" was filmed on location in Sandy River, Mount Hood and Timberline, Oregon.  This is the second Western film collaboration between Anthony Mann and James Stewart.

Mando Alvarado: Mando Alvarado is a Mexican-American playwright, screenwriter and actor originally from Pharr, Texas.  At age nine, his father died.  He grew up with two younger brothers and describes himself as a bully towards them in their younger years.  He first got involved with theater in middle school, when his Drama teacher told him he would need to take a role in a production to pass the class.  Alvarado's first play-writing experience was a monologue inspired by Luis Valdez's "Zoot Suit", particularly Edward James Olmos' character El Pachuco.  His first full-length play was written after he first moved to New York City, while he worked a temp-job in Midtown.  After a reading with Raúl Castillo in a Lower East Side bar, Alvarado decided focus his career on writing.

Anthony Mann: Anthony Mann (June 30, 1906 – April 29, 1967) was an American actor and film director, most notably of films noir and Westerns.  As a director, he often collaborated with the cinematographer John Alton and with actor James Stewart in his Westerns.

Zoot Suit (film): Zoot Suit is a 1981 film adaptation of the Broadway play "Zoot Suit".  Both the play and film were written and directed by Luis Valdez.  The film stars Daniel Valdez, Edward James Olmos — both reprising their roles from the stage production — and Tyne Daly.  Many members of the cast of the Broadway production also appeared in the film.  Like the play, the film features music from Daniel Valdez and Lalo Guerrero, the "father of Chicano music."

Supporting paragraphs: Anthony Mann Luis Valdez
Answer: Anthony Mann