{"last_modified": {"type": "/type/datetime", "value": "2010-12-04T05:11:25.219427"}, "title": "Testing of a diesel-powered impact cutting head for hard-rock mining", "created": {"type": "/type/datetime", "value": "2009-12-10T06:58:47.199003"}, "subjects": ["Free piston engines", "Mining machinery", "Testing"], "latest_revision": 2, "key": "/works/OL4616573W", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL946634A"}}], "type": {"key": "/type/work"}, "revision": 2}