Sample query

SELECT ?hour, ?min, ?person 
WHERE 
 (ical::vevent ?cal ?event) 
 (ical::attendee ?event ?person) 
 (ical::dstart ?event ?date) 
 (rdfs::label ?date 2001-05-15) 
 (ical::hour ?date ?hour) 
 (ical::minute ?date ?min) 
USING ical FOR http://ilrt.org/2001/05/ical#  
foaf FOR http://xmlns.com/foaf/0.1/ 
rdfs FOR http://www.w3.org/2000/01/rdf-schema#