input question: Sentence: The mayor of Antwerp is Bart De Wever.

Structured data: Antwerp, mayor, Bart De Wever

input question: Sentence: Arlington is part of Texas where Houston is the largest city.

Structured data: Arlington, Texas, isPartOf, Texas; Texas, largestCity, Houston

input question: Sentence: A Wizard of Mars is a book from the United States. The capital of that country is Washington D.C. and English is spoken there (as in Great Britain). One of the ethnic groups there is African American.

Structured data: United States, ethnicGroup, African Americans; English language, spokenIn, Great Britain; United States, capital, Washington, D.C.; United States, language, English language; A Wizard of Mars, country, United States

input question: Sentence: An ingredient of beef kway teow, which originates from Singapore and is a popular food of Indonesia, is palm sugar.

Structured data:
Beef kway teow, region, Singapore; Beef kway teow, country, Indonesia; Beef kway teow, ingredient, Palm sugar