Historical clue formulations

• Reinforce — 2023-03-19
• Give support to — 2022-09-26
• Strengthen — 2016-08-08
• Fortify — 2013-09-06
• Add support to — 2013-04-02
• Prop up — 2013-01-06
• Support — 2008-08-02
• Fortify — 2000-11-15