Question: Who was the 2013 coach of the team whose mascot is Sir Purr?
Answer(s):
answer: Ron Rivera

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.current_head_coach ?x .
}