REMOVE

1. viewers (observers)
2. exhibitions (events)
3. graphite

WHAT

1. art galleries (institutio … (1)
2. art schools (institutions … (1)
3. artists (visual artists) (1)
4. Information Forms (hierar … (1)
5. ink (1)
6. paintings (visual works) (1)
7. students (1)
8. testimonials (1)

WHERE

1. San Francisco, California (1)

WHEN

1. 1950 (1)