[ ] There are a number of speaker duplicates and each speaker entry is related to a talk. Fix: Merge separate speaker entries and ensure a one to multi relationship (one speaker -> several events)
[ ] Change tracks to different colors
[ ] Find any other issues with the sample and fix it.
The OpenTechSummit event sample at https://github.com/fossasia/open-event/tree/master/sample/OTS16 still has a few issues: