Task: Text Simplification
Input (English): history arch mineral corporation was founded in 1969 as a partnership between ashland oil -lrb- now ashland , inc . -rrb- and the hunt family of dallas , texas.
Output (English): history of arch mineral corporation was founded in 1969 as a partnership between ashland oil . -lrb- now ashland , inc . -rrb- and the hunt family of dallas , texas.