21.   Autissier studied weather patterns for a year before the race, and used that knowledge to flatten her competitors in the first leg.

22.   Gray has been studying hurricane patterns in history and says the trend of more and fewer storms is cyclical and not related to pollution or global warming.

23.   Banks therefore had to study patterns of behaviour and contacts between individuals to trace terrorist financing.

24.   The team of investigators also studied earth patterns for clues to what had been moved.