Premise: Diana Trask (born 23 June 1940) is an Australian country and pop singer born in Melbourne, Australia. She was a popular country singer during the 1970s in the United States and also was a popular star in her native Australia. In the U.S., she charted eighteen singles on the country charts, of which the highest was the number 13 "Lean It All on Me" in 1974.
Hypothesis: Trask was at least 33 years old when her song "Lean It All on Me" was number 13 on the country charts.