Question: WHat is the highest position in theUnited States Environmental Protection Agency ?
Paraphrase: WHat is the most elevated position in theUnited States Natural Assurance Office ?
SPARQL (Wikidata):  select distinct ?obj where { wd:Q460173 wdt:P2388 ?obj . ?obj wdt:P31 wd:Q4164871 } 
Answer: Administrator of the Environmental Protection Agency