Complex sentence: Theories for Bierce's vanishing after the date of the letter are numerous, including stories from locals in Sierra Mojada, Coahuila, documented by the priest James Lienert, stating that Bierce was executed by firing squad in a local town cemetery.
Split into simpler sentences: Theories for Bierce's vanishing after the date of the letter are numerous. Stories from locals in Sierra Mojada, Coahuila, documented by the priest James Lienert, stated that Bierce was executed by firing squad in a local town cemetery.