Complex sentence: Kahn made her Broadway debut in "Leonard Sillman's New Faces of 1968" and received her first two Tony Award nominations for the 1973 original Broadway production of "Boom Boom Room" and the 1978 revival of "On the Twentieth Century".
Split into simpler sentences: Kahn made her Broadway debut in "Leonard Sillman's New Faces of 1968". She received her first two Tony Award nominations for the 1973 original Broadway production of "Boom Boom Room" and the 1978 revival of "On the Twentieth Century".