It's highly interconnected. For example, you can make hops like USCounty--USState--Senator--Vote on economic stimulus bill. The data backend is indeed NoSQL,

It's highly interconnected. For example, you can make hops like USCounty--USState--Senator--Vote on economic stimulus bill. The data backend is indeed NoSQL, but we didn't choose a graph db because there are no really good graph solutions that are easily parallelized.