{"first_sentence": {"type": "/type/text", "value": "Some 100 living species of mammals (listed in Appendix 3) depend on the ocean for most or all of their life needs."}, "physical_format": "Hardcover", "subtitle": "Evolutionary Biology", "last_modified": {"type": "/type/datetime", "value": "2008-04-30 09:38:13.731961"}, "weight": "2.6 pounds", "languages": [{"key": "/l/eng"}], "type": {"key": "/type/edition"}, "publishers": ["Academic Press"], "number_of_pages": 494, "isbn_13": ["9780120932252"], "id": 12532171, "edition_name": "1st edition", "isbn_10": ["0120932253"], "publish_date": "October 15, 1999", "key": "/b/OL9280407M", "authors": [{"key": "/a/OL719169A"}], "title": "Marine Mammals", "contributions": ["James L. Sumich (Editor)"], "subjects": ["Animal ecology", "Evolution", "Marine & freshwater mammals", "Science/Mathematics", "Mammals", "Organic Evolution", "Nature", "Science", "Marine Mammals", "Life Sciences - Biology - Marine Biology", "Life Sciences - Evolution", "Nature / General", "General", "Life Sciences - Ecology"], "physical_dimensions": "10.2 x 7.1 x 0.8 inches", "revision": 1}