Complex sentence: Before long he had gained "child prodigy" status and was good enough to play for an audience-he gave a 15 minute Chopin recital at the Waldorf Astoria at the age of four.
Split into simpler sentences: Before long he had gained "child prodigy" status and was good enough to play for an audience-and he did. He gave a 15 minute Chopin recital at the Waldorf Astoria at the age of four.