Question: What is the official website of a cemetery where Welsh-speaking John Hughes was buried ?
Choices: http://www.tv-tokyo.co.jp/bleach/2008/
http://www.sfai.edu
https://www.afcb.co.uk/
https://www.cityofomaha.org/
http://www.agathachristie.com/
http://www.gulfport-ms.gov
https://www.lambeth.gov.uk/places/west-norwood-crematorium-and-cemetery
http://www.blu-raydisc.com
http://www.icc.govt.nz
http://www.wichita.gov
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "cemetery" . ?e_1 <place_of_burial> ?e . ?e_1 <pred:name> "John Hughes" . ?e_1 <languages_spoken,_written_or_signed> ?e_2 . ?e_2 <pred:name> "Welsh" .  ?e <official_website> ?pv .  }
Program:
function: Find
inputs: Welsh
function: Relate
dependencies: 0
inputs: languages spoken, written or signed
backward
function: Find
inputs: John Hughes
function: And
dependencies: 1
2
function: Relate
dependencies: 3
inputs: place of burial
forward
function: FilterConcept
dependencies: 4
inputs: cemetery
function: QueryAttr
dependencies: 5
inputs: official website
Answer: https://www.lambeth.gov.uk/places/west-norwood-crematorium-and-cemetery