A further complication is likely to come from the 'small world principle' (aka Kevin Bacon model). Any person/events/items on the planet are only and average 5.5-6 degrees removed from anything else on the planet. It'll be a huge DB. Analysis becomes an exercise in AI. For manual, semi-automated and autonomous methods this reference might help https:// www.wisdomjobs.com/e-university/artificial-intelligence-tutorial-340/the-small-world-phenomenon-and-dijkstra-s-algorithm-12353.html