Complex sentence: Andrea (Laurie Holden) and Michonne (Danai Gurira) witness the crash and investigate, finding two of the crew dead and the pilot, Welles, heavily injured.
Split into simpler sentences: Andrea (Laurie Holden) and Michonne (Danai Gurira) witness the crash and move in to investigate. However, they find two of the crew dead and the Welles (the pilot) heavily injured.