Chord diagram to explore the overlap in years between different Sikh gurus life spans.
Interesting how Guru Ram Das was alive during Guru Nanak's life and Guru Amar Das for 60 years of Guru Nanak's 70 years.
The data is available via spreadsheett
Sources:
https://cdnjs.cloudflare.com/ajax/libs/d3/3.4.13/d3.min.js
https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.7.0/underscore-min.js