Question: For whom did the actor who portrayed the character Dolphin Player  play before becoming a Celtic?
Answer(s):
answer: Minnesota Timberwolves

SPARQL query:
#MANUAL SPARQL
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
filter(?x != ns:m.0bwjj)
?c ns:film.actor.film ?k .
?k ns:film.performance.character ns:m.0yrc9x2 . 
?c ns:sports.pro_athlete.teams ?z .
?z ns:sports.sports_team_roster.team ns:m.0bwjj . #Celtics
?z ns:sports.sports_team_roster.from ?from .
?c ns:film.actor.film ?k .
?k ns:film.performance.character ns:m.0yrc9x2 . 
?c ns:sports.pro_athlete.teams ?y .
?y ns:sports.sports_team_roster.team ?x .
?y  ns:sports.sports_team_roster.to ?to .
FILTER (xsd:dateTime(?from) - xsd:dateTime(?to) >= 0)
}
ORDER BY Desc(xsd:datetime(?from))
LIMIT 1