| http://www.w3.org/ns/prov#value | - As expected, physical disciplines such as athletics peaked very early (often in the 20's) whereas intellectual endeavers peaked later (often in the 60's).Being a pianist, I found it interesting that the concensus was that concert pianists peaked at about the mid 50's.I would expect from all this that singer/songwriters would peak later than concert pianists, their discipline being much less physic
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