A backyard exchange of vows is not a marriage. The photograph does not include the couple's three youngest grandchildren, who were born in the last few years. See you Monday! Absolutely diabolical behaviour. But oh, did I catch some big fish with this one!
Certainly not a marital exchange.
( z0 exchange :ARG1 ( z1 marry ) :mod ( z2 certain ) :polarity - )
(z0 / exchange-01
    :ARG1 (z1 / marry-01)
    :mod (z2 / certain)
    :polarity -)
Certainly not a marital exchange .
z0 :ARG1 z1
z0 :polarity 0
z0 :mod z2