Complex sentence: Fictionalised versions of this incident have appeared in various accounts of the Wallace's life, notably in the 1995 film "Braveheart", in which his wife was called Murron MacClannough, and her execution precipitated the battle.
Split into simpler sentences: Fictionalised versions of this incident have appeared in various accounts of the Wallace's life, notably in the 1995 film "Braveheart". In the film, his wife was called Murron MacClannough, and it was her execution that led up to the battle.