Complex sentence: Jeff Martin first pitched the idea of Homer being in a theatrical production of "1776"; producer James L. Brooks then suggested that Marge could play Blanche DuBois in "A Streetcar Named Desire".
Split into simpler sentences: Jeff Martin first pitched the idea of Homer being in a theatrical production of "1776". Producer James L. Brooks then suggested that Marge could play Blanche DuBois in "A Streetcar Named Desire".