Complex sentence: Yelena (Mariya Strelkova), a wanna-be singer who is unable to hold the tune, mistakes shepherd Kostya Potekhin (Leonid Utyosov) for a famous conductor of a jazz orchestra and invites him to an elegant party.
Split into simpler sentences: Yelena (Mariya Strelkova) is a wanna-be singer but is unable to hold tune. She mistakes shepherd Kostya Potekhin (Leonid Utyosov) for a famous conductor of a jazz orchestra and invites him to an elegant party.