{"last_modified": {"type": "/type/datetime", "value": "2010-12-02T06:02:45.953744"}, "title": "Mass migration in the world-system", "created": {"type": "/type/datetime", "value": "2010-12-02T06:02:45.953744"}, "subjects": ["Emigration and immigration", "Social aspects", "Political aspects", "Economic aspects"], "latest_revision": 1, "key": "/works/OL15530786W", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL5078970A"}}], "type": {"key": "/type/work"}, "revision": 1}