Question: What was a mission of Martin Luther King Jr and was spoken about by John F Kennedy?
Answer(s):
answer: Anti-Apartheid

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.051cc)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.051cc ns:base.activism.activist.area_of_activism ?x .
?x ns:event.speech_topic.speeches_or_presentations_on_this_topic ?c .
?c ns:event.speech_or_presentation.speaker_s ns:m.0d3k14 . 
}