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.

when damocles was discovered , in 1991 by robert h. mcnaught , it was found to be on an orbit completely different from all others known.
when damocles was first seen , in 1991 by robert h. mcnaught , it was found to be on an orbit much different from all others known.