Simplify the following text for a Grade 6 native English-speaking person.
Original: Billy Budd is an opera by Benjamin Britten , from a libretto by E. M. Forster and Eric Crozier , was first performed at the Royal Opera House , Covent Garden , London on 1 December 1951 .
Simplified: Billy Budd is an opera by Benjamin Britten . It was first performed at the Royal Opera House , Covent Garden , London on 1 December 1951 .