en.wikipedia.org/wiki/Human_breast_milk I think the picture and the description below it is misleading as there's no such thing as an empty breast? The main bit of the article on composition is right though.
I'd do it myself but I'm rubbish at stuff like this.
I'd just leave it - it says 'nearly empty' after all I agree the terminology of 'empty' is not helpful but a breast can be 'almost empty' albeit for a very short time indeed ('cos production speeds up with less milk in the breast). Those samples will have been got by very thorough pumping, and the 'almost empty' one will have been when the pump really can't get much more...which does happen.