Question:  As a young artist, Esperanza Martínez studied with a famous Mexican muralist married to what fellow artist? 
Context: Forrest Hibbits was a mid-century fine artist and watercolorist.  He was born in Lompoc, California, on October 9, 1905.  He left the Hibbits family ranch to attend the California College of Arts and Crafts and graduated ca. 1927.  He taught at the San Francisco Art Institute.  Hibbits was married to fellow artist Marie Jaans (born in Belgium 1895 – died in Solvang, 1984), whom he met in North Beach.  He created a poster for the 1939 World's Fair (Golden Gate International Exposition on Treasure Island in San Francisco.  Hibbits worked as a commercial illustrator along with fellow artist Clyde Follet Seavey at Patterson and Sullivan in San Francisco.  Marie and Forrest moved from San Francisco back to the Lompoc/Santa Ynez Valley area in the 1940s after Hibbits joined the Army, and lived there for the rest of their lives.  He worked as an illustrator for the Army, and also created a collection of cartoons, which he sent to friends and relatives.  Later, he taught at the Santa Barbara Art Institute. Roger von Gunten (born 1933) is an artist and sculptor, originally from Zurich, but in 1980 became a naturalized Mexican citizen.  He was the subject of a 1978 essay by Jomí García Ascot and was part of the "Breakaway Generation" which emerged after World War II ending the Mexican Muralist era.  For over a decade, he was involved in a legal battle over who defines what is art.  He has participated in over 200 national and international art exhibitions and won the 2014 Fine Art Medal from Mexico. Ralph Ward Stackpole (May 1, 1885 – December 13, 1973) was an American sculptor, painter, muralist, etcher and art educator, San Francisco's leading artist during the 1920s and 1930s.  Stackpole was involved in the art and causes of social realism, especially during the Great Depression, when he was part of the Public Works of Art Project, Federal Art Project of the Works Progress Administration, and the Treasury Department's Section of Painting and Sculpture.  Stackpole was responsible for recommending that architect Timothy L. Pflueger bring Mexican muralist Diego Rivera to San Francisco to work on the San Francisco Stock Exchange and its attached office tower in 1930–31.  His son Peter Stackpole became a well-known photojournalist. Tropic or Trópico is a 1945 painting by Spanish artist Josep Renau.  Renau executed the painting during his exile in México, while he collaborated with Mexican muralist painters such as David Alfaro Siqueiros.  The painting represents a landscape, probably a Mexican natural space.  Three vultures surround a fish skeleton on the lower right side of an uninhabited landscape.  The scene evokes the desolation and destruction of humankind provoked by the wars of the 20th century, in the precise year of the end of World War II, which left a death toll of 60 million people. Alma Marie Sullivan Reed (1889–1966) was a US journalist.  While working in Mexico in the 1920s, she fell in love with the governor of Yucatán, Felipe Carrillo Puerto; however, he was assassinated while she was home in San Francisco preparing for their wedding.  Reed was a promoter of the career of Mexican muralist José Clemente Orozco and wrote a biography of him as well as a work on Mexican muralists generally. Esperanza Martínez (1934–1998) was a Mexican-born painter who lived in Southern California.  She was known for portraits and genre scenes of rural Mexican farmers, formal portraits of prominent Mexican-Americans and pastel paintings of Native American subjects.  As a precocious young artist, Martinez studied with the famous Mexican muralist Diego Rivera.  She moved to the Los Angeles area in 1963 and lived with her family in Hacienda Heights.  Martinez died from cancer in 1998. Gabrielle de Veaux Clements (September 11, 1858 – March 26, 1948) was an American painter, print maker, and muralist.  She studied art at the Philadelphia School of Design for Women, Pennsylvania Academy of the Fine Arts, and in Paris at Académie Julian.  Clements also studied science at Cornell University and graduated with a Bachelor of Science degree.  She created murals, painted portraits, and made etchings.  Clements taught in Philadelphia and in Baltimore at Bryn Mawr School.  Her works have been exhibited in the United States and at the Paris Salon.  Clements works are in several public collections.  Her life companion was fellow artist Ellen Day Hale. Stefan Hirsch (January 2, 1899 – September 28, 1964) was an American artist.  Many of his paintings have the hard edges, smooth surfaces, and simplified forms of the precisionists and their typical subjects—cityscapes and industrial scenes—are sometimes also his, but in general his works have an emotional element and, as one critic as said, "take on an otherworldly tone" that sets them apart.  In addition to work showing a personal version of precisionism, he produced paintings, drawings, and prints in the social realist, Mexican muralist, and surrealist styles as well as still lifes, portraits, and landscapes that defy easy classification.  His work achieved critical recognition from 1919 onward, has been widely collected, and is today found in many American museums including the Phillips Collection, the Whitney Museum of American Art, the Metropolitan Museum of Art, and the Corcoran Gallery. Diego María de la Concepción Juan Nepomuceno Estanislao de la Rivera y Barrientos Acosta y Rodríguez, known as Diego Rivera (] ; December 8, 1886 – November 24, 1957) was a prominent Mexican painter.  His large frescoes helped establish the Mexican mural movement in Mexican art.  Between 1922 and 1953, Rivera painted murals among others in Mexico City, Chapingo, Cuernavaca, San Francisco, Detroit, and New York City.  In 1931, a retrospective exhibition of his works was held at the Museum of Modern Art in New York.  Rivera had a volatile marriage with fellow Mexican artist Frida Kahlo. Esperanza Martínez (born April 26, 1959) is a Paraguayan medical doctor and politician, senator for the left wing alliance Frente Guazu and an active member of the party Participación Ciudadana (PPC).  From August 2008 till June 2012 was the Paraguayan Minister of Public Health and Social Welfare under President Fernando Lugo.
Answer: Frida Kahlo