The
predicate part of the clause.
A "verb, adverb, noun" statement in the
indicative mood, normaly used activily with the unknown subject part of the clause. The tense is unkown.
the predicate describes that the unknown subject is/has/had/will be/ect taking back sunday, as in...
To obtain the first day of the week, which was
previously owned by you, from someother source.