The problem is one of determining the dominant factors in this phenomenon. The problem is one of interpreting these ancient scriptures. The problem is outside my field. The problem is receiving increased attention. The problem is that ..... The problem is that he is penniless. The problem is that my son doesn't want to go to school. The problem is that Nancy doesn't go to the club meetings. The problem is that our car will not be available on that day. The problem is that security standards have slackened. The problem is that she is inexperienced. The problem is that solar energy costs too much.