I want to know the answer to the following question:
When did Tom Ricketts and Crane Kenney unveil plans for a five-year funded renovation of Wrigley Field?
All the background I'm provided with is that "In 2013, Tom Ricketts and team president Crane Kenney unveiled plans for a five-year, $575 million privately funded renovation of Wrigley Field.". Is that enough to answer the question?