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: The Polish people, or Poles (, singular Polak), are a Western Slavic ethnic group of Central Europe, living predominantly in Poland.

The polish people are known as Poles (singular Polak) live mostly in Poland. They are a Western Slavic ethnic group of Central Europe.