Sentence: Alvah Sabin represented Vermont whose largest city is Burlington. He represented Vermont's 3rd Congressional District. Daniel Webster is the leader of the Whig party.

What structured data could we extract from this sentence?
Alvah Sabin, party, Whig Party (United States); Whig Party (United States), leader, Daniel Webster; Alvah Sabin, region, Vermont's 3rd congressional district; Vermont, largestCity, Burlington, Vermont; Alvah Sabin, state, Vermont