Original sentence: The installations of the Met, La Scala and the Arcimboldi, the Vienna State Opera, Liceu, and the Royal Opera House were possible with the donations of the philantropist Alberto Vilar, at the time a majority shareholder of Figaro Systems
Edited sentence: The installations of the Met, La Scala and the Arcimboldi, the Vienna State Opera, Liceu, and the Royal Opera House were possible with the donations of the philanthropist Alberto Vilar, at the time a majority shareholder of Figaro Systems