Historical clue formulations

• Fuzzy — 2021-12-03
• Fuzzy — 2019-10-25
• Unclear — 2018-08-13
• Like the description "somewhere in the U.S." — 2017-09-20
• Not fully formed — 2007-03-04
• Fuzzy — 2004-03-06
• Hard to pin down — 2000-09-14