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.

From 1911-1913, he was working for his uncle in the Branch coalmines in West Virginia.