machine_question: what was the name of jfk 's brothers and is the public speaker which spoke about Assassination of Martin Luther King, Jr.
question: Which brother of JFK spoke about assassination of Martin Luther King Jr?
sparql: PREFIX ns: <http://rdf.freebase.com/ns/>
  SELECT DISTINCT ?x
  WHERE {
  FILTER (?x != ns:m.0d3k14)
  FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
  ns:m.0d3k14 ns:people.person.sibling_s ?y .
  ?y ns:people.sibling_relationship.sibling ?x .
  ?x ns:people.person.gender ns:m.05zppz .
  ?x ns:event.public_speaker.speeches_or_presentations ?c .
  ?c ns:event.speech_or_presentation.speech_topic ns:m.03hm37s . 
  }
webqsp_question: what was the name of jfk 's brothers