Distribution from Charitable Gift Annuity: where is it from??

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I am entering information into TurboTax regarding distributions from a charitable gift annuity.  I am asked,  Where is this distribution from?  The only answers that could possibly make sense are "not eligible for exclusion for those over age 59 1/2" (whose meaning I don't understand) or "None of the above."  Would greatly appreciate some help here.  BTW, I am age 74 if that is important.