Have a read of the first page of this article:-
http://www.dailyreckoning.com.au/four-commodity-investment-ideas-from-around-the-world/2011/09/03/
then consider this:-
Common director between TRH and PRA are:-
Ananada Kathiravelu Executive Director PRA
Ananda Kathiravelu Chairman TRH
Then do some detailed research on PRA.