A couple walks hand-in-hand in front of Victorian-style building and a wall with a large sleeping baby painted on it.
A couple walks in front of a boat.
what are the couples walking in front of, the Victorian-style building and a wall with a large sleeping baby painted on it or a boat
The couple either walks in front  Victorian-style building or in front of a boat.
couple can't walk in front of boat if they walk in front of building and wall