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: The form of quinine most effective in treating malaria was found by Charles Marie de La Condamine in 1737.

This type of quinine drug is effective in treating malaria. It was found by Charles Marie de La Condamine in 1737.