Question: What company headquartered in San Ramon, California and third in the Fortune 500 list of the top US closely held and public corporations, owns the Petronius tower?
Sentence (from "Forest Home Farms"): After Ruth Boone’s death in 1998 at the age of 94, the City expanded the memorial to include Ruth, in honor of her generosity to the people of San Ramon and in recognition of the contribution women made to agriculture in the San Ramon Valley.
Relevant evidence: No