Complex sentence: But months later of the same year, Carpenter hired Bill Phillips to work on another draft that resembled Lancaster's draft, but when The Thing bombed, Universal replaced Carpenter with Mark L. Lester.
Split into simpler sentences: But months later of the same year, Carpenter hired Bill Phillips to work on another draft that resembled Lancaster's draft. When "The Thing" bombed, Universal replaced Carpenter with Mark L. Lester.