Does it ring a bell !!!

ShirleyGuess who I met at the grocery store.
LeonardI can't imagine.
Shirley Do you remember Mr. Johnson from our old neighborhood.
Leonard That name rings a bell, but I can't place him.
Shirley He used to live in the building next to ours.
Leonard Oh yes, now I remember. He had dark hair and wore glasses.
Explanation :
If you say that something rings a bell , you mean that it reminds you of something else, but you cannot remember exactly what it is ......