Tables in Google Knowledge Graph Cards

Google's Knowledge Graph cards sometimes include tables extracted from web pages. For example, when searching for [fl food stamp number], Google shows the phone number of the Supplemental Nutrition Assistance Program office from Florida. Google mentions that the page has "53 more rows and 2 more columns".

Here's the page used by Google to find the phone number:

Google also shows table snippets for regular search results and has an experimental table search engine.