Historical clue formulations

• Separate wheat from chaff — 2021-08-24
• Do some farmwork — 2015-01-11
• Do some post-harvesting work — 2012-04-14
• Separate grains from wheat, e.g. — 2009-04-27
• Separate wheat from chaff — 2009-03-08
• Separate the wheat from the chaff — 2009-01-29
• What combines do — 2008-11-15
• Beat, as wheat — 2005-11-23
• Beat hard — 1998-12-07
• Beat, as grain — 1994-11-13