Stockholm-based AI start-up Sana Labs is dedicated to using machine learning to personalize education that's accessible to everyone. The 22-year old founder, Joel Hellermark, is catching the attention of such huge tech players -- including Mark Zuckerberg and Tim Cook. Cheddar Business' Kristen Scholer sat down with Hellermark at SXSW to talk about how he's shaping the education industry through AI and machine learning.