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@Brendanjones OSM for geo-social applications: `Arrive`, `Leave`, `Travel` activities, plus the `location` element of other activities or content objects.

MB and OL for media experience activities like `Listen`, `View`, `Read`. So, `Evan read Doppelganger` or `Evan listened to A Little Respect by Erasure`.

Wikidata for these and, like, a million other uses.