REMOVE

1. graphite
2. paintings (visual works)
3. art schools (institutions)

WHAT

1. Information Forms (hierar … (1)
2. art galleries (institutio … (1)
3. artists (visual artists) (1)
4. exhibitions (events) (1)

More 

WHERE

1. San Francisco, California (1)

WHEN

1. 1950 (1)