I want to test the ability of students to read a passage and answer questions about it. Could you please come up with a good question for the passage "In 2002, the Museum acquired the Costiff collection of 178 Vivienne Westwood costumes. Other famous designers with work in the collection include Coco Chanel, Hubert de Givenchy, Christian Dior, Cristóbal Balenciaga, Yves Saint Laurent, Guy Laroche, Irene Galitzine, Mila Schön, Valentino Garavani, Norman Norell, Norman Hartnell, Zandra Rhodes, Hardy Amies, Mary Quant, Christian Lacroix, Jean Muir and Pierre Cardin. The museum continues to acquire examples of modern fashion to add to the collection."? 

The 178 Vivienne Westwood costumes in the Costiff collection are grouped together where?