Eleanor Antin is one of the odder humans. She’s a photography, video, installation, and performance artist; an inventor of personas. She was, for a time in the ’70s, a bearded King wandering Solana Beach near San Diego. Later, she was a Crimean War nurse, a black Ballets Russes ballerina. Her own life began in the radical politics of her Bronx Jewish family, with a Stalinist mother and socialist father. In this rare appearance at Seattle Art Museum, she enacts scenes from her that-couldn’t-possibly-be-true memoir, Conversations With Stalin. She’s brilliant and she’s 78 years old.