Sentence: A Wizard of Mars is written in English, the spoken language of Great Britain. However, it originates from the United States where the African Americans are an ethnic group and the country's leader is known as the President.

What data can be extracted from this sentence?
United States, ethnicGroup, African Americans; United States, leaderTitle, President of the United States; A Wizard of Mars, language, English language; English language, spokenIn, Great Britain; A Wizard of Mars, country, United States