Complex sentence: In 1977, Gold joined "The Muppet Show" during the show's second season where she was quickly trained by Jim Henson as a puppeteer, becoming the only British puppeteer regularly employed on the show.
Split into simpler sentences: In 1977, Gold joined "The Muppet Show", during the show's second season, where Jim Henson trained her as a puppeteer. She became the only British puppeteer regularly employed on the show.