Original sentence: Melodies that have survived have been praised as "flexible, expressive melodies (that) show an elegance and technical adroitness that are very similar to the qualities that have been long admired in Abelard's poetry
Edited sentence: Melodies that have survived have been praised as "flexible, expressive melodies [that] show an elegance and technical adroitness that are very similar to the qualities that have been long admired in Abelard's poetry