Complex sentence: In her first film role Buring starred in a leading role in the 2005 horror film "The Descent" by director Neil Marshall, and appeared in its sequel, "The Descent Part 2", in the form of flashbacks.
Split into simpler sentences: In her first film role Buring starred in a leading role in the 2005 horror film "The Descent" by director Neil Marshall. Buring also appeared in the films sequel, The Descent Part 2, in the form of flashbacks.