Complex sentence: This album is a part of Velasquez's former label Viva Records 25th Silver Anniversary celebration, which they released their Silver Series of compilation of their past artists including Velasquez.
Split into simpler sentences: This album is a part of Velasquez's former label Viva Records 25th Silver Anniversary celebration, which they released their Silver Series project. The project is a compilation album of their past artists including Velasquez.