The website Foursquare notably held a large, global hackathon in 2011, in which over 500 developers at over 30 sites around the world competed to create applications using the Foursquare API [REF].
In 2014, the British government and HackerNest ran DementiaHack,[REF] the world's first hackathon dedicated to improving the lives of people living with dementia and their caregivers [REF].