Question: Who sang for Pink Floyd and has been on TV since 01-03-2006?
Answer(s):
answer: David Gilmour

SPARQL query:
#MANUAL SPARQL
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
  {
    ns:m.01wv9xn ns:music.musical_group.member ?y .
    ?y ns:music.group_membership.member ?x ;
       ns:music.group_membership.role ns:m.0290ngj . #vocals
  }
  UNION
  {
    ns:m.01wv9xn ns:music.musical_group.member ?y .
    ?y ns:music.group_membership.member ?x ;
       ns:music.group_membership.role ns:m.0_sv_90 . #lead vocals
  }?x ns:tv.tv_personality.tv_regular_appearances ?c .
?c ns:tv.tv_regular_personal_appearance.from "2006-01-03"^^xsd:dateTime . 
}