Question: Alan Dunbar (born 30 April 1990) is a Northern Irish professional golfer who won the 2012 Amateur Championship at Royal Troon, His home club is Rathmore Golf Club near Portrush, in which county that's one of six counties that form Northern Ireland?
Sentence (from "1989 Open Championship"): Calcavecchia was the first American champion at The Open in six years.
Relevant evidence: No