Sentence: The maiden flight of the Antares rocket was on April 21st, 2013.

Question: What structured data could we extract from this sentence?

A: Antares (rocket), maidenFlight, 2013-04-21

Sentence: AEK Athens FC compete in the Superleague Greece, Olympiacos FC are previous champions of the team.

Question: What structured data could we extract from this sentence?

A: AEK Athens F.C., league, Superleague Greece; Superleague Greece, champions, Olympiacos F.C.

Sentence: Amarillo is in Potter County, Texas where English is spoken. It is in the US, whose capital is Washington DC.

Question: What structured data could we extract from this sentence?

A:
Amarillo, Texas, isPartOf, Potter County, Texas; Texas, language, English language; Potter County, Texas, state, Texas; United States, capital, Washington, D.C.; Amarillo, Texas, country, United States