Thanks to a chat that I had online, I am now aware of OpenCyc, Falcons, and UMBEL. Actually, I may have heard of UMBEL before.
In any case, UMBEL and OpenCyc are very broad ontologies. OpenCyc is by far the larger one. Falcons is a semantic web search engine.
Thanks to the chat, I also found that the goodrelations ontology is useful when someone owns something. In addition, I also found that the UMBEL ontology describes charitable donations.