Question: What is the total fertility rate for operators of the Cessna 172 Skyhawk?
Paraphrase: What is the Cessna 172 Skyhawk's total fertility rate for operators?
SPARQL (Wikidata): SELECT ?answer WHERE { wd:Q244479 wdt:P137 ?X . ?X wdt:P4841 ?answer}
Answer: 6.08