Update README.md

README.md

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 license: apache-2.0
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-This dataset has been extracted from the Unreal Engine documentation and contains all the resources up to Unreal Engine 5.3. The parsing is not perfect, but the important bits are there. The source files are also provided if you want to parse the documentation yourself. 
+This dataset has been extracted from the Unreal Engine documentation and contains all the resources up to Unreal Engine 5.3. The parsing is not perfect, but the important bits are there. The source files and URLs are also provided if you want to parse the documentation yourself. 
 
 The sources.7z file contains all the HTML files (409_188 files) that were used to extract the text for the dataset. Keep in mind that the file has been compressed extensively and is roughly 77GB when unzipped.