Complex sentence: Their founders included Margaret Masterman, Richard Braithwaite, Dorothy Emmet, Robert H. Thouless, Michael Argyle and Ted Bastin and later members included Rupert Sheldrake, Rowan Williams, Clive W. Kilmister, Frederick Parker-Rhodes and Yorick Wilks.
Split into simpler sentences: Their founders included Margaret Masterman, Richard Braithwaite, Dorothy Emmet, Robert H. Thouless, Michael Argyle and Ted Bastin. Later members included Rupert Sheldrake, Rowan Williams, Clive W. Kilmister, Frederick Parker-Rhodes and Yorick Wilks.