REMOVE

1. Belgium
2. Japan
3. Basel, Switzerland
4. exhibitions (events)

WHAT

1. Visual Works (hierarchy n … (1)
2. black-and-white film (1)
3. buildings (structures) (1)
4. doors (1)
5. driveways (1)

More 

WHERE

1. New Windsor, Maryland (1)

WHEN

1. 1971 (1)
2. ca. 1971 (1)