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: From 1948 - 52, a series of guest conductors led the orchestra, including Leonard Bernstein and Leopold Stokowski.

Leonard Bernstein and Leopold Stokowski were among the guest conductors who led the orchestra between 1948 and 1952.