Sentence: The capital of the United States is Washington DC and the language spoken is English, which is also the language of Great Britain. The book Alcatraz Versus the Evil Librarians comes from the country where one of the ethnic groups are the White Americans.

What structured data could we extract from this sentence?
English language, spokenIn, Great Britain; United States, capital, Washington, D.C.; United States, language, English language; United States, ethnicGroup, White Americans; Alcatraz Versus the Evil Librarians, country, United States