Question: What disease does the artist who went on the HIStory World Tour suffer from?
Answer(s):
answer: Mysophobia

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ?c)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
?c ns:music.artist.concert_tours ns:m.09x1nf . 
?c ns:medicine.notable_person_with_medical_condition.condition ?x .
}