Complex sentence: Graffiti Markup Language (GML) is an XML-based file format that stores graffiti motion data that was created by Jamie Wilkinson, Chris Sugrue, Theo Watson and Evan Roth, popular applications such as Graffiti Analysis, EyeWriter and Mozilla's Firefox MarkUp implement GML.
Split into simpler sentences: Graffiti Markup Language (GML) is an XML-based file format that stores graffiti motion data that was created by Jamie Wilkinson, Chris Sugrue, Theo Watson and Evan Roth. Popular applications such as Graffiti Analysis, EyeWriter and Mozilla's Firefox MarkUp implement GML.