Question: Which awards did Morgan Freeman win, where the ceremonies start date was after February 28, 1951?
Answer(s):
answer: Golden Globe Cecil B. DeMille Award
answer: Screen Actors Guild Award for Outstanding Performance by a Male Actor in a Supporting Role
answer: NAACP Image Award for Outstanding Actor in a Motion Picture
answer: Obie Award for Performance
answer: People's Choice Award for Favorite Movie Icon
answer: NAACP Image Award for Outstanding Supporting Actor in a Motion Picture
answer: AFI Life Achievement Award
answer: People's Choice Award for Favorite Cast
answer: Kennedy Center Honors

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.055c8)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.055c8 ns:award.award_winner.awards_won ?y .
?y ns:award.award_honor.award ?x .
?x ns:award.award_category.recurring_ceremony ?c .
?c ns:award.category_ceremony_relationship.from ?num .
FILTER (?num > "1951-02-28"^^xsd:dateTime) . 
}