Does FEEM Sustainability Index consider air quality?
ASK {
  ?papers rdf:type orkgc:Paper.
  ?papers rdfs:label ?papers_labels.
  FILTER(REGEX(?papers_labels, "FEEM Sustainability Index"))
  ?papers orkgp:P31 ?contrib.
  ?contrib ?properties ?properties_values.
  ?properties rdfs:label ?properties_labels.
  FILTER(REGEX(?properties_labels, "air quality", "i"))
  FILTER(?properties_values = "yes")
}