What is the relationship between marked and history 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.

"Those two infamous days in gold's history was marked by a constant decline in prices throughout both sessions, while yesterday's tumble was marked by a one-minute drop followed by a substantial recovery," said Lee.

Answer: original_broadcaster