Giovanni de Gamerra
Operas based on his librettos include Sarti's "Medonte , re di Epiro" and Josef Mysliveček's "Il Medonte" , Paisiello's "Pirro" , several operas by Antonio Salieri and Mozart's "Lucio Silla" ( though this libretto was modified by Metastasio ) . 
<triplet> Il Medonte <subj> Josef Mysliveček <obj> composer