Question: Who is a person who plays keyboard instrument and speaks German ?
Choices: Sarah Brightman
John Cale
Richard Strauss
Peter Horton
Serj Tankian
Bruno Mars
Mark Ronson
Rodney Jerkins
Carey Mulligan
Theodor W. Adorno
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "human" . ?e <instrument> ?e_1 . ?e_1 <pred:name> "keyboard instrument" .  ?e <languages_spoken,_written_or_signed> ?e_2 . ?e_2 <pred:name> "German" .  }
Program:
function: Find
inputs: keyboard instrument
function: Relate
dependencies: 0
inputs: instrument
backward
function: FilterConcept
dependencies: 1
inputs: human
function: Find
inputs: German
function: Relate
dependencies: 3
inputs: languages spoken, written or signed
backward
function: FilterConcept
dependencies: 4
inputs: human
function: And
dependencies: 2
5
function: What
dependencies: 6
Answer: Sarah Brightman