The 2007 Grand National (known as the John Smith's Grand National for sponsorship reasons) was the 160th official annual running of the world-famous Grand National steeplechase which took place at Aintree Racecourse near Liverpool, England, on 14 April 2007 and attracted the maximum permitted field of forty competitors for a total prize money of £700,000 including £399,140 to the winner.
Can we infer the following?
Only forty competitors could participate in the 160th official annual Grand National steeplechase and every slot was filled.

Select from the following. --Yes; --It's impossible to say; --No;
The answer is:
Yes