Question: Which men have been head coach for the football organization whose team mascot goes by the moniker Sir Purr?
Answer(s):
answer: George Seifert
answer: Dom Capers
answer: John Fox

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:sports.sports_team.team_mascot ns:m.03lr5s . 
?c ns:american_football.football_team.historical_coaching_staff ?y .
?y ns:american_football.football_historical_coach_position.coach ?x .
}