Complex sentence: He frequently clashed with the reconstituted S.H.I.E.L.D. led by Phil Coulson, and was later killed by Coulson, depriving Calvin of his revenge.
Split into simpler sentences: He frequently clashed with the reconstituted S.H.I.E.L.D. led by Phil Coulson. Whitehall was later killed by Coulson, depriving Calvin of his revenge.