Complex sentence: The art collection of Monique Zajfen constituted of the works by The Vincent Award winners and purchases of works by other contemporary artists is given to the Stedelijk Museum of Amsterdam on long-term loan.
Split into simpler sentences: The art collection of Monique Zajfen constituted of the works by The Vincent Award winners and other contemporary artists. Zaifen's collection was given to the Stedelijk Museum of Amsterdam on long-term loan.