Question: What large city is the twinned administrative body of Palo Alto (whose elevation is 30 feet above sea level), starting in the year 2017?
Choices: Regensburg
Halle (Saale)
Dnipro
Utrecht
Wuppertal
Stuttgart
Bordeaux
Lyon
Heidelberg
Fort Smith
SPARQL: SELECT DISTINCT ?e WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "big city" . ?e <twinned_administrative_body> ?e_1 . ?e_1 <pred:name> "Palo Alto" . ?e_1 <elevation_above_sea_level> ?pv . ?pv <pred:unit> "foot" . ?pv <pred:value> "30"^^xsd:double .  [ <pred:fact_h> ?e ; <pred:fact_r> <twinned_administrative_body> ; <pred:fact_t> ?e_1 ] <start_time> ?qpv . ?qpv <pred:year> 2017 .  }
Program:
function: Find
inputs: Palo Alto
function: FilterNum
dependencies: 0
inputs: elevation above sea level
30 foot
=
function: Relate
dependencies: 1
inputs: twinned administrative body
backward
function: QFilterYear
dependencies: 2
inputs: start time
2017
=
function: FilterConcept
dependencies: 3
inputs: big city
function: What
dependencies: 4
Answer: Heidelberg