@prefix rdfs:    <http://www.w3.org/2000/01/rdf-schema#> .
@prefix d:       <http://learningsparql.com/ns/data#> .
@prefix dm:      <http://learningsparql.com/ns/demo#> .

dm:prob29
      rdfs:label    "Location value must be a URI." .

d:item693
      dm:problem    dm:prob29 .