Question: Who operates the McDonnell Douglas F-15 Eagle and what is its powerplant?
Paraphrase: What powerplant is associated with McDonnell Douglas F-15 Eagle and who operates it?
SPARQL (Wikidata): SELECT ?ans_1 ?ans_2 WHERE { wd:Q29251 wdt:P137 ?ans_1 . wd:Q29251 wdt:P516 ?ans_2 }
Answer: Pratt & Whitney F100, United States Air Force, Pratt & Whitney F100, Israeli Air Force, Pratt & Whitney F100, Republic of Korea Air Force, Pratt & Whitney F100, Japan Air Self-Defense Force, Pratt & Whitney F100, Royal Saudi Air Force, Pratt & Whitney F100, Republic of Singapore Air Force