TASK DEFINITION: In this task, you're given a sentence and your task is to generate a simplified sentence that focuses on lexical paraphrasing from the original sentence given in the input.
PROBLEM: 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.

SOLUTION: history arch mineral corporation was started in 1969 as a partnership between ashland oil -lrb- now ashland , inc . -rrb- and the hunt family of dallas , texas.

PROBLEM: later , esperanto speakers began to see the language and the culture that had grown up around it as ends in themselves , even if esperanto is never adopted by the united nations or other international organizations.

SOLUTION: later , esperanto speakers began to see the language and the culture that had grown up around it as ends in themselves , even if it is never used by the united nations or other international organizations.

PROBLEM: the wave traveled across the atlantic , and organized into a tropical depression off the northern coast of haiti on september 13.

SOLUTION:
the wave moved across the atlantic , and developed into a tropical storm off the northern coast of haiti on september 13.