diff --git a/Example-Presentations.md b/Example-Presentations.md
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--- a/Example-Presentations.md
+++ b/Example-Presentations.md
@@ -8,6 +8,7 @@ Featured:
 * [Mass of Planets | Explore the solar system with hand gestures](http://lightning.fm/massofplanets/)
 
 Feel free to edit this page and add your own presentations below:
+* [Untangling the hairball](johnguerra.co/slides/untanglingTheHairball/#/) [John Alexis Guerra Gómez](http://twitter.com/duto_guerra) talk at [OpenVisConf 2017|https://openvisconf.com/#jgomez-video-item].
 * [ActivityWatch | Log what you do on your computer. Simple, extensible, no third parties.](http://activitywatch.net/slides/) by [@ErikBjare](https://github.com/ErikBjare)
 * [Symbolic Regression on Network Properties](https://www.nas.ewi.tudelft.nl/people/mmaertens/presentations/symbreg/symbreg.html) by [@CoolRunning](https://github.com/CoolRunning)
 * [Summer of Secure Code - Minimum Viable Gala 2016](http://slides.com/evilon/ouspg-open-2016/) by [@evilon](https://github.com/evilon)