PREFIX lc: PREFIX gtfs: PREFIX rdfs: PREFIX lcd: PREFIX td: PREFIX xsd: SELECT (COUNT(DISTINCT(?connection)) AS ?count ) WHERE { ?connection lcd:departureDelay ?delay ; lc:departureStop ?stop . ?stop gtfs:parentStation ?station . ?station rdfs:label "" . ?delay lcd:delayReason ?reason . ?reason a td:InfrastructureWorks . }