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: In the 11th and 12th century Soest grew considerably, making it one of the biggest towns in Westphalia with some 10,000 citizens.

In the 11th -12th century, Soest grew a lot, making it one of the biggest towns in Westphalia with 10,000 citizens.