Some relatable songs are Pumped up kicks-Foster the people; Come home- One republic; I want to hold your hand-Beatles; Safe and sound-Taylor Swift; 21 guns- Green Day; we will rock you-Queen
You didn't italize or mark the phrase, but I see one good candidate:
"The circus animal trainer" is in a way another name given to Mervin, a kind of "renaming" him: this is called an appositive phrase, so if this was the phrase appositive phrase is the answer! (also, I don't see the other phrases here).
