A crowd in which two men are wearing Santa Claus Hats are celebrating Christmas outside of a Bank of America and a Christmas tree.
A crowd is celebrating Christmas outside of Bank of America.
Wearing Santa Claus Hats implies celebrating.
A crowd is celebrating Christmas outside of Bank of America is part of the original description of in which two men are wearing Santa Claus.
Wearing Santa Claus hats is a way of celebrating Christmas in public.