Data: English language, spokenIn, Great Britain; United States, capital, Washington, D.C.; United States, language, English language; A Wizard of Mars, country, United States

The capital of the United States, where A Wizard of Mars was published, is Washington, D.C. English is the language of the U.S, and is spoken in Great Britain too.

Data: United States, leader, Joe Biden

Joe Biden is a United States leader.

Data: AZ Alkmaar, manager, John van den Brom; John van den Brom, club, AFC Ajax; John van den Brom, club, De Graafschap; AZ Alkmaar, owner, Robert Eenhoorn
AZ Alkmaar is owned by Robert Eenhoorn and managed by John van den Brom who plays for AFC Ajax and De Graafschap.