Complex sentence: Kauffman and Crane began developing "Friends" under the title "Insomnia Cafe" in November/December 1993 and they presented the idea to Bright, with whom they had previously worked, and together they pitched a seven-page treatment of the series to NBC.
Split into simpler sentences: Kauffman and Crane began developing "Friends" under the title "Insomnia Cafe" in November/December 1993. They presented the idea to Bright, with whom they had previously worked, and together they pitched a seven-page treatment of the series to NBC.