Transcription: The cool thing about working with entities inside your document is once you declare them, you get to use them in your content the same way whether they be an internal entity where you're doing a text replacement or an external entity where you're actually including the contents of a document. It all comes down to the way you declare the entity, whether it be an internal entity or an external entity. Let's take a look at an example because I think it's going to be a lot more clear when you actually see this in action.
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