What is the relationship between back on and TOKYO in the context of the input sentence. Choose an answer from: product/material produced; manufacturer; distributed by; industry; position held; original broadcaster; owned by; founded by; distribution format; headquarters location; stock exchange; currency; parent organization; chief executive officer; director/manager; owner of; operator; member of; employer; chairperson; platform; subsidiary; legal form; publisher; developer; brand; business division; location of formation; creator.

TOKYO Aug 19 The yields on long-dated Japanese government bonds bounced back on Wednesday after their fall to 3-1/2-month lows triggered profit-taking in volatile trade.

Answer: location_of_formation