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: Since Poland's accession to the European Union, a significant number of Poles have emigrated to Western European countries such as the United Kingdom, Germany and Ireland in search of work.

Since Poland joined the European Union, a large number of Poles moved to Western European countries such as the United Kingdom, Germany and Ireland. They moved there to look for work.