Question: What land vehicle is the main subject of the visual artwork with the title The Cassandra Crossing?
Choices: Grammy Award for Best Rock Instrumental Performance
Vietnam War
Westmoreland County
Texas Rangers
Persian
passenger car
Belmont University
train
Midnight's Children
Nikon
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "land vehicle" . ?e_1 <main_subject> ?e . ?e_1 <pred:instance_of> ?c_1 . ?c_1 <pred:name> "visual artwork" . ?e_1 <title> ?pv . ?pv <pred:value> "The Cassandra Crossing" .   }
Program:
function: FindAll
function: FilterStr
dependencies: 0
inputs: title
The Cassandra Crossing
function: FilterConcept
dependencies: 1
inputs: visual artwork
function: Relate
dependencies: 2
inputs: main subject
forward
function: FilterConcept
dependencies: 3
inputs: land vehicle
function: What
dependencies: 4
Answer: train