+ <index type="bf.topic">
+ ?thing ?rel ?topic .
+ ?topic a bf:Topic .
+ ?topic bf:label %v FILTER(contains(%v, %s))
+ </index>
+ <index type="bf.place">
+ ?thing ?rel ?place .
+ ?place a bf:Place .
+ ?place bf:label %v FILTER(contains(%v, %s))
+ </index>
+ <index type="bf.agent">
+ ?thing ?rel ?person .
+ ?person a bf:Agent .
+ ?person bf:label %v FILTER(contains(%v, %s))
+ </index>
+ <index type="bf.meeting">
+ ?thing ?rel ?meeting .
+ ?meeting a bf:Meeting .
+ ?meeting bf:label %v FILTER(contains(%v, %s))
+ </index>
+ <index type="bf.organization">
+ ?thing ?rel ?organization .
+ ?organization a bf:Organization .
+ ?organization bf:label %v FILTER(contains(%v, %s))
+ </index>
+ <index type="bf.event">
+ ?thing ?rel ?event .
+ ?event a bf:Event .
+ ?event bf:label %v FILTER(contains(%v, %s))
+ </index>