Question: What player started his career in 1981 and is the coach of Inter Milan now?
Answer(s):
answer: Walter Mazzarri

SPARQL query:
PREFIX ns: <http://rdf.freebase.com/ns/>
SELECT DISTINCT ?x
WHERE {
FILTER (?x != ns:m.03x6m)
FILTER (!isLiteral(?x) OR lang(?x) = '' OR langMatches(lang(?x), 'en'))
ns:m.03x6m ns:sports.sports_team.coaches ?y .
?y ns:sports.sports_team_coach_tenure.coach ?x .
FILTER(NOT EXISTS {?y ns:sports.sports_team_coach_tenure.from ?sk0} || 
EXISTS {?y ns:sports.sports_team_coach_tenure.from ?sk1 . 
FILTER(xsd:datetime(?sk1) <= "2015-08-10"^^xsd:dateTime) })
FILTER(NOT EXISTS {?y ns:sports.sports_team_coach_tenure.to ?sk2} || 
EXISTS {?y ns:sports.sports_team_coach_tenure.to ?sk3 . 
FILTER(xsd:datetime(?sk3) >= "2015-08-10"^^xsd:dateTime) })
?x ns:sports.pro_athlete.sports_played_professionally ?c .
?c ns:sports.pro_sports_played.career_start "1981"^^xsd:dateTime . 
}