Vangelis wrote music for two more ballets: "Frankenstein – Modern Prometheus" and "The Beauty and the Beast". In 1992, Vangelis wrote the music for a restaging of the Euripides play, Medea, that featured Irene Papas. In 2001 he composed for a third play which starred Papas, and for a version of William Shakespeare's The Tempest staged by Hungarian director György Schwajdas. Solo albums and collaborations Vangelis collaborated in 1976 with Italian singer Patty Pravo with the album Tanto and with Italian singer Milva achieving success, especially in Germany, with the albums Ich hab' keine Angst also translated in French as Moi, Je N'ai Pas Peur (1981) and Geheimnisse in 1986 (I have no fear and Secrets), also translated in Italian as Tra due sogni. An Italian language Nana Mouskouri album featured her singing the Vangelis composition "Ti Amerò". Collaborations with lyricist Mikalis Bourboulis, sung by Maria Farantouri, included the tracks "Odi A", "San Elektra", and "Tora Xero". Vangelis released Soil Festivities in 1984. It was thematically inspired by the interaction between nature and its microscopic living creatures; Invisible Connections (1985) took inspiration from the world of elementary particles invisible to the naked eye; Mask (1985) was inspired by the theme of the mask, an obsolete artefact which was used in ancient times for concealment or amusement; and Direct (1988). The last of the aforementioned efforts was the first album to be recorded in Vangelis's post-Nemo Studios era. Vangelis performed his only concert in the U.S. on 7 November 1986 at Royce Hall on the campus of University of California, Los Angeles. It featured a special guest appearance by Jon Anderson. There were another five solo albums in the 1990s; The City (1990) was recorded during a stay in Rome in 1989, and reflected a day of bustling city life, from dawn until dusk; Voices (1995) featured sensual songs filled with nocturnal orchestrations; Oceanic (1996) thematically explored the mystery of underwater worlds and sea sailing; and two classical albums about El Greco – Foros Timis Ston Greco (1995), which had a limited release, and El Greco (1998), which was an expansion of the former. Sporting events The Sport Aid (1986) TV broadcast was set to music specially composed by Vangelis. He conceived and staged the ceremony of the 1997 World Championships in Athletics which were held in Greece. He also composed the music, and designed and directed the artistic Olympic flag