Allow a building to have multiple loot groups?

[DY357LX]

If you look in somewhere like:

  Quote

CfgLoot\Buildings\Church.hpp

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you can see:

lootGroup = Church;

I was just wondering if it's possible to alter this so that buildings pull loot from multiple tables?
I've tried:

lootGroup[] = {Church,Military,Supermarket};

But this stopped any loot from spawning in churches. (Maybe quotation marks are needed around names?)

Anyone have any ideas? If not, what's the best way to alter the loot tables so that more guns and building supplies spawn?
(Do the numbers/chance percentages still have to total 100?)
Thanks.