1. Nor will plans to tackle controversial subjects such as terrorism have to be notified to the licensing body in advance of filming. BNC
2. Try to anticipate any controversial subjects and disasters you might have to mention, or avoid mentioning, in the course of your speech. BNC
3. This time the Americans have been talking to negotiators as often as three times a day, sitting with one side and then another to explore positions on such controversial issues as the disposition of authority over West Bank land. BNC