Jason,
You load UMBEL, you will have a good head start re. DBpedia and
OpenCyc.
Then you can add to your base from the OpenCyc to DBpdia links for
those entities not exposed via UMBEL to DBpedia linkage.
You shouldn't need to go directly to DBpedia as UMBEL, OpenCyc, and
Yago provide nice data access routes.
Kingsley