Question: What land estate has been designated a National Historic Landmark?
Choices:
Albany
New England Conservatory of Music
Pennsylvania Academy of the Fine Arts
Grove Street Cemetery
Olympia
Empire State Building
movie theater
commercial art gallery
Taj Mahal
United States Naval Academy
Answer: Empire State Building
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "estate in land" . ?e <heritage_designation> ?e_1 . ?e_1 <pred:name> "National Historic Landmark" .   }
Program:
function: Find
inputs: National Historic Landmark
function: Relate
dependencies: 0
inputs: heritage designation
backward
function: FilterConcept
dependencies: 1
inputs: estate in land
function: What
dependencies: 2