Simplify the following text for a Grade 8 native English-speaking person.
Original: Prokofiev composed the score for Eisenstein 's film and Eisenstein reciprocated by designing sets for an operatic rendition of War and Peace that Prokofiev was developing .
Simplified: Prokofiev composed the score for Eisenstein 's film . Eisenstein designed sets for an opera version of War and Peace that Prokofiev was creating .