Complex sentence: One of the assessors, Mary-Ellen Mullane, previously wrote to one of the film's producers, Simon Nasht, in May 2013, requesting an updated contract that removes Simon Sheikh as a co-producer and strips out any editorial/creative control.
Split into simpler sentences: One of the assessors, Mary-Ellen Mullane, previously wrote to one of the film's producers, Simon Nasht, in May 2013. She requested an updated contract that removes Simon Sheikh as a co-producer and strips out any editorial/creative control.