Question: WHich VIce President erved under the President who was a former member of the Texas Air National Guard?
Answer(s):
answer: Dick Cheney

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:military.military_person.service ?k .
?k ns:military.military_service.unit ns:m.028cg1y . 
?c ns:government.us_president.vice_president ?x .
}