Question: What is the International Standard Industrial Classification code Rev.4 for the economic branch that uses train?
Choices: php
Metropolitan Museum of Art
asphyxia
1888000000000 United States dollar
Bill Clinton
491
01
21
Free State of Brunswick
10.1093/ww/9780199540884.013.261949
SPARQL: SELECT DISTINCT ?pv WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "economic branch" . ?e_1 <use> ?e . ?e_1 <pred:name> "train" .  ?e <International_Standard_Industrial_Classification_code_Rev.4> ?pv .  }
Program:
function: Find
inputs: train
function: Relate
dependencies: 0
inputs: use
forward
function: FilterConcept
dependencies: 1
inputs: economic branch
function: QueryAttr
dependencies: 2
inputs: International Standard Industrial Classification code Rev.4
Answer: 491