Historical clue formulations

• Argentine plain — 2025-10-30
• Prairie east of the Andes — 2021-01-31
• Argentine grassland — 2006-03-18
• Texas panhandle town — 2001-10-28
• Argentine plain — 2001-01-16
• Argentine expanse — 1998-01-06
• South American prairie — 1996-10-12