Complex sentence: The dagger has been sought out by many parties, two of whom Lara Croft encounters on her journey: a group known as the Fiamma Nera (Italian for "Black Flame") and a group of Tibetan Monks.
Split into simpler sentences: The dagger has been sought out by many parties, two of whom Lara will encounter on her journey. These are the Fiamma Nera (Italian for "Black Flame"), and the Tibetan Monks.