REMOVE

1. paths
2. athletes
3. spectators (event observers)
4. barriers

WHAT

1. automobiles (1)
2. black-and-white film (1)
3. buildings (structures) (1)
4. exterior views (1)
5. fences (1)
6. horses (animals) (1)
7. men (male humans) (1)
8. plants (1)
9. polo (field sport) (1)
10. polo clubs (built complex … (1)
11. polo fields (1)
12. signs (declatory or adver … (1)
13. sky (1)
14. sports uniforms (1)
15. trees (1)
16. Visual Works (hierarchy n … (1)
17. woods (plant communities) (1)

WHERE

1. Aiken, South Carolina (1)

WHO

1. Clyfford Still; Still, Cl … (1)
2. Still, Clyfford (1)

WHEN

1. 1966 (1)