Entities with names with a space i.e. "Name Name2" cannot be targeted with name=Name Name2 in @e selectors

Entities with names with a space i.e. "Name Name2" cannot be targeted with name=Name Name2 in @e selectors.

I noticed that whilst playing around with Holograms and one of the horses is named "5 Minutes". That horse cannot be targeted by @e. However when i name it "5_Minutes" it will work but since I am using it as a display it wouldn't be good.