Commentary: Syntax is: NP VOW COMP
They vowed they'd go after him.
Candidates each vowed to strictly enforce drunken-driving laws.
Amanda has vowed to never be a victim again.
He vowed to never tell a lie, to never deceive.
The vassal vowed to his lord that he would love what the landlord loved.
WordNet 3.0 Sense Numbers: 1
Commentary: Syntax is: NP1 VOW NP2
NOTE: often seen in passives and reduced relative clauses
A thing or person thus vowed to the deity became holy and sanctified to God.
The offering vowed to the Lord is an animal that may be sacrificed.
His mother vowed him to the said saint.
I was an old soldier for the Confederation, who was baptized and vowed to the Deity.
He became aware that his parents had vowed him to the service of Blessed Mary and mended his ways.
WordNet 3.0 Sense Numbers: 2