Remembering by association

Bert to Fred : Did you try that new restaurant last night ?
Fred to Bert : Yes we can recommend it .
Bert to Fred : What is it called ?
Fred : I can't rember but I'll ask the wife , (shouts to kitchen )---Darling what is the name of that prickly bush , which blooms in all colours and has a lovely perfume .
She answers ' rose '
Fred :Thanks, Rose can you tell me the name of that restaurant we visited last night ? Bert wants to know.