Question: How many infectious diseases have old age as one risk factor?
Choices: 0
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SPARQL: SELECT (COUNT(DISTINCT ?e) AS ?count) WHERE { ?e <pred:instance_of> ?c . ?c <pred:name> "infectious disease" . ?e_1 <risk_factor> ?e . ?e_1 <pred:name> "old age" .   }
Program:
function: Find
inputs: old age
function: Relate
dependencies: 0
inputs: risk factor
forward
function: FilterConcept
dependencies: 1
inputs: infectious disease
function: Count
dependencies: 2
Answer: 2