premise: The 2016 City of Onkaparinga ATP Challenger was a professional tennis tournament played on hard courts. It was the second edition of the tournament which was part of the 2016 ATP Challenger Tour. It took place in Happy Valley, Australia between 2–10 January 2016.
hypothesis: A professional tennis tournament played on soft courts took place in Australia.
reason: Another tennis tournament may have taken place somewhere in Australia at some point and used soft courts.