If you're interested in challenges, could you consider temporal graphs? Both from the perspective of tracking graph evolution (audit trail), and using a graph t

If you're interested in challenges, could you consider temporal graphs? Both from the perspective of tracking graph evolution (audit trail), and using a graph to model historical events, where relations occur for periods of time - it always sounds doable and then I sit down to do it :) Throw in probability and vagueness (history examples: this happened sometime in the 1950s / we're only 50% certain that Henry VII was the father of this child) and it becomes a whole lot more complicated; yet what can be inferred increases in usefulness. My inspiration is http://commons.pelagios.org/ http://commons.pelagios.org/ and the digital humanities field.