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As part of a collaboration with the International Olympics Committee, Facebook has launched an athlete-centric page …As well as profiles of 250 (so far) out of the 10,000 or more athletes taking part this year, the page includes profiles of the different nations taking part. …
Facebook heralds arrival of Olympics with dedicated new page
Looks like a work in progress. Assume it will grow quickly.
But the unusual interface may confuse.

