Task: Text Simplification
Input (English): werner heisenberg -lrb- 5 december 1901 – 1 february 1976 -rrb- was a german theoretical physicist who made foundational contributions to quantum mechanics and is best known for asserting the uncertainty principle of quantum theory.
Output (English): werner heisenberg -lrb- 5 december 1901 – 1 february 1976 -rrb- was a german theoretical physicist who made major contributions to quantum mechanics and is best known for asserting the uncertainty principle of quantum theory.