REMOVE

1. trees
2. tile (materials)
3. sky
4. benches (furniture)
5. sweaters
6. buildings (structures)

WHAT

1. Visual Works (hierarchy n … (1)
2. artists (visual artists) (1)
3. beards (1)
4. branches (plant component … (1)

More 

WHERE

1. Westminster, Maryland (1)

WHEN

1. 1970 (1)
2. 1975 (1)
3. between 1970 - 1975 (1)