Complex sentence: Also in 2001, Swiss collector Gérard Corboud gave his comprehensive impressionist and postimpressionist collection as a permanent loan to the museum, which added "Fondation Corboud" to its name.
Split into simpler sentences: Also in 2001, Swiss collector Gérard Corboud gave his comprehensive impressionist and postimpressionist collection to the museum as a permanent loan. The museum then added "Fondation Corboud" to its name.