Complex sentence: Rosica Colin (c.1903-25 April 1983) was a Romanian literary agent, based in London, who was know for her promotion of works in translation and, in English, Alan Sillitoe, J.T. Edson, Howard Sackler and Howard Brenton.
Split into simpler sentences: Rosica Colin (c.1903-25 April 1983) was a Romanian literary agent, based in London, who was principally know for her promotion of works in translation. She was principally know for her promotion of works in translation, but also for, in English, Alan Sillitoe, J.T. Edson, Howard Sackler and Howard Brenton.