This one came about because I was searching for a data set on horror films (don't ask) and ended up with one describing the links between philosophers.
To cut a long story very short I've extracted the information in the influenced by section for every philosopher on Wikipedia and used it to construct a network which I've then visualised using gephi
It's an easy process to repeat. It could be done for any area within Wikipedia where the information forms a network. I chose philosophy because firstly the influences section is very well maintained and secondly I know a little bit about it. At the bottom of this post I've described how I got there.
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