Previous relevant research

https://www.youtube.com/watch?v=p5_WkM7S5U0&feature=youtu.be&list=LLXqin5AiLNJccJRQmdMevsQScreen Shot 2014-11-20 at 14.09.30

https://www.youtube.com/watch?v=oOZY7Yks6hI&feature=youtu.be&list=LLXqin5AiLNJccJRQmdMevsQ Screen Shot 2014-11-20 at 14.10.03  Screen Shot 2014-11-20 at 14.14.33

https://www.youtube.com/watch?v=o1h97XYUByo&list=LLXqin5AiLNJccJRQmdMevsQ&index=5Screen Shot 2014-11-20 at 14.13.11

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