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: Between 1911 and 1913, he was employed by his uncle in the office of the Branch coalmines in West Virginia.

Between 1911 and 1913, he was employed by his uncle. He worked in the office of the Branch coalmines in West Virginia.