Question: What year did the graduate form Poland Academy become the president?
Answer(s):

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:people.person.education ?k .
?k ns:education.education.institution ns:m.04t5jdz . 
?c ns:government.politician.government_positions_held ?y .
?y ns:government.government_position_held.from ?x .
}