When I was doing my masters in ancient Indian history, one of my professors used to say thar it's not enough to just look at findings of excavation but you have to understand them in relation of everything. Bill (read Uncle Bill) has been my source of understanding the core of SEO for years. Structured data is my favorite part of SEO and I have learnt a lot through what Bill wrote over the years. I have never had a chance to meet him but I wish him speedy recovery and great health in coming years.