Question: What is its official website for Mainz?
Choices:
http://waltdisneystudios.com/corp/unit/74
https://www.jerseycitynj.gov/
http://www.shelbycountykentucky.com
http://www.bucknell.edu
http://www.frf.ro/
http://www.konyaspor.org.tr/
https://www.mainz.de/
http://www1.villanova.edu/content/main.html
http://pirates.disney.com/pirates-of-the-caribbean-on-stranger-tides
http://www.wvu.edu/
Answer: https://www.mainz.de/
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:name> "Mainz" . ?e <official_website> ?pv .  }
Program:
function: Find
inputs: Mainz
function: QueryAttr
dependencies: 0
inputs: official website