Definition: Rewrite each original sentence in order to make it easier to understand by non-native speakers of English. You can do so by replacing complex words with simpler synonyms (i.e. paraphrasing), deleting unimportant information (i.e. compression), and/or splitting a long complex sentence into several simpler ones. The final simplified sentences need to be grammatical, fluent, and retain the main ideas of their original counterparts without altering their meanings.
Input: Post-hardcore is a music genre that evolved from hardcore punk, itself an offshoot of the broader punk rock movement.

Post-hardcore is a music genre. It evolved from hardcore punk. Hardcore punk was an offshoot of the broader punk rock movement.