Information: - Cary Grant (born Archibald Alexander Leach; January 18, 1904 November 29, 1986) was a British-American actor, known as one of classic Hollywood's definitive leading men. He began a career in Hollywood in the early 1930s, and became known for his transatlantic accent, debonair demeanor, and light-hearted approach to acting and sense of comic timing. He became an American citizen in 1942. - Daktari (Swahili for "doctor") is an American children's drama series that aired on CBS between 1966 and 1969. The series, an Ivan Tors Films Production in association with MGM Television, stars Marshall Thompson as Dr. Marsh Tracy, a veterinarian at the fictional Wameru Study Centre for Animal Behaviour in East Africa. - Metro-Goldwyn-Mayer Television (alternatively Metro-Goldwyn-Mayer Television and Digital Group (commonly known as MGM Television and then-known as MGM/UA Television) is an American television production/distribution studio launched in 1955 and a division of Metro-Goldwyn-Mayer. - Betsy Drake (September 11, 1923 October 27, 2015) was a French-born American actress and writer. She was also known for being the third wife of actor Cary Grant. - CBS (an initialism of the network's former name, the Columbia Broadcasting System) is an American commercial broadcast television network that is a flagship property of CBS Corporation. The company is headquartered at the CBS Building in New York City with major production facilities and operations in New York City (at the CBS Broadcast Center) and Los Angeles (at CBS Television City and the CBS Studio Center). - Clarence , the Cross-Eyed Lion is a 1965 film directed by Andrew Marton and starring Marshall Thompson and Betsy Drake . The movie was shot at Soledad Canyon near Los Angeles , California , and in Miami , Florida , and became the basis for the television series Daktari . - Ivan Tors (born Ivan Torzs; June 12, 1916 June 4, 1983) was a Hungarian playwright, film director, screenwriter, and film and television producer with an emphasis on non-violent but exciting science fiction, underwater sequences, and stories involving animals. He started a Miami-based film studio now known as Greenwich Studios, and later a music company. Given the information above, choose from the list below the object entity that exhibits the relation 'producer' with the subject 'clarence'. Choices: - cary grant - columbia - ivan tors - mgm
A:
ivan tors