The task is to identify if a given passage or sentence has proper punctuation. This includes proper capitalization and the use of punctuations such as commas, semi-colons and full-stops. The answer is True if all punctuation is properly applied, else the answer is False.

Let me give you an example: jack ate the beans that the old man gave him.
The answer to this example can be: False
Here is why: The first letter of a new sentence is not capitalized, hence punctuation is incomplete.

OK. solve this:
Boxes and cases were stacked behind him.
Answer:
True