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.