Original sentence: The first row, later to be famously known as "The Trench" (a term coined by Apollo-era RETRO controller John Llewellyn, when, according to Flight Director Eugene Kranz, reminded him of the firing range during his years as a U
Edited sentence: The first row, later to be famously known as "The Trench" (a term coined by Apollo-era RETRO controller John Llewellyn, which, according to Flight Director Eugene Kranz, reminded him of the firing range during his years as a U