Question: Who's the new senator of the location, that has a governmental office holder called, John E. Rickards?
Answer(s):
answer: John Walsh

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:government.governmental_jurisdiction.governing_officials ?k .
?k ns:government.government_position_held.office_holder ns:m.02vxvb_ . 
?c ns:government.political_district.representatives ?y .
?y ns:government.government_position_held.office_holder ?x .
?y ns:government.government_position_held.office_position_or_title ns:m.02_7l8y .
?y ns:government.government_position_held.from ?sk0 .
}
ORDER BY DESC(xsd:datetime(?sk0))
LIMIT 1