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 and 12th century Soest became one of the biggest towns in Westphalia with some 10,000 citizens.