I'm trying to add one of the effects of Mausoleum at Halicarnassus from Civ 5 to the Civ 6 version but I don't see any modifiers that add a yield when you use a Great Person. The only thing I see is from the Great Merchants who grant gold when used. So I'm thinking that adding the modifier to attach a modifier to all great persons to grant gold when used. It seems to be the long way around, but should do what I need. Is there an easier way?