Task: Text Simplification
Input (English): heaven 's gate was an american ufo cult based in san diego , california and led by marshall applewhite -lrb- 1931-1997 -rrb- and bonnie nettles -lrb- 1927-1985 -rrb-.
Output (English): heaven 's gate was an american ufo cult in san diego , california . it was led by marshall applewhite and bonnie nettles.