 Complete the following phrase:  Riefoli has also written songs for other Italian artists; the track Si può dare di più, written for the trio Morandi-Ruggeri-Tozzi, won the first prize at the San Remo Festival. Riefoli co-wrote the song Gente di mare with Umberto Tozzi and Giancarlo Bigazzi, and his duet with Tozzi became Italys entry in the 