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.

the most common side effects of taking methylphenidate are nervousness and insomnia.
being unable to sleep and nervousness are normal things may happen when you are taking methylphenidate.

their religion is predominantly roman catholic.
they are mainly roman catholic.

it is not known how much , if any , of this story is true , but historians do know that china was the first civilization to use silk.

it is not known how much story is true , but historians do know that china was the first people to use silk.

