REMOVE

1. studios (work spaces)
2. cans (containers)
3. curtains (window hangings)

WHAT

1. Visual Works (hierarchy n … (1)
2. artists (visual artists) (1)
3. artists' materials (1)
4. black-and-white film (1)

More 

WHERE

1. 48 Cooper Square, New Yor … (1)

WHO

1. Hans Namuth (1)
2. Namuth, Hans (1)

WHEN

1. 1951 (1)