AFTER THE CEREMONY. - this phrase is an adverb phrase.
Adverb phrase is a group of words that act as an adverb. It modifies a verb, adverb, or adjective and can tell "how", "where", "why", or "when".
In this case, the adverb phrase tell "when". When did the bride left with the groom? After the ceremony.
Cain killed Abel... Is that what you are looking for?
