DIED. Yves Montand, 70, durable French entertainer who in later life achieved international film stardom; of a stroke; in Senlis, France. The Italian-born Montand gained fame as a singer and protege of his lover Edith Piaf, with whom he appeared in his first film (Star Without Light). He also co-starred with Marilyn Monroe (Let's Make Love) and Simone Signoret (The Crucible), his real-life wife for 34 often tempestuous years. A longtime left-wing activist who later moderated some of his views, Montand played an antiright maverick in Costa-Gavras' Z and won highest acclaim for his role as a scheming peasant in Claude Berri's two-part film adaptation of Marcel Pagnol's Jean de Florette and Manon of the Spring. At 67 he became a father for the first time with the birth of his son by companion Carole Amiel.