Question: Land of the Lost, with Will Ferrell as a cast member, is about which taxonomic group?
Choices: Northern Dancer
Cichlidae
Allium cepa
virus
Capsicum
Micropterus salmoides
dinosaur
Persea americana
time travel
Pyrus
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "taxon" . ?e_1 <main_subject> ?e . ?e_1 <pred:name> "Land of the Lost" . ?e_1 <cast_member> ?e_2 . ?e_2 <pred:name> "Will Ferrell" .   }
Program:
function: Find
inputs: Will Ferrell
function: Relate
dependencies: 0
inputs: cast member
backward
function: Find
inputs: Land of the Lost
function: And
dependencies: 1
2
function: Relate
dependencies: 3
inputs: main subject
forward
function: FilterConcept
dependencies: 4
inputs: taxon
function: What
dependencies: 5
Answer: dinosaur