Historical clue formulations

• Crow language family — 2022-09-04
• Language family that includes Crow and Lakota — 2019-05-19
• Like many Plains Indians — 2014-07-18
• Iowa, for one — 2008-12-10
• Osage, e.g. — 2005-04-29
• Amerindian language — 2000-05-10