title: Katherine Schmidt
context: Katherine Schmidt (February 6, 1899 – April 18, 1978) was an American artist and art activist. Early in her career the figure studies, landscapes, and still lifes she painted drew praise for their "purity and clarity of color," "sound draftsmanship," and "individual choice of subject and its handling."[3] During the 1930s she was known mainly for the quality of her still life paintings which showed, one critic said, "impeccable artistry."[4] At the end of her career, in the 1960s and 1970s, she produced specialized and highly disciplined still lifes of objects such as dead leaves and pieces of crumpled paper, which, said a critic, approached a "magical realism."[5] As an art activist she helped promote the rights of artists for fair remuneration.[6]
question: What activism did Katherine Schmidt participate in?
answers: art