{ "contents": [ { "type": "atom", "index": 0, "x": 0.0, "y": 0.0 }, { "type": "atom", "element": "O", "index": 1, "x": 1.0, "y": 0.0 }, { "type": "bond", "a": 0, "b": 1, "lines": [ "solid", "solid", "solid" ] } ] }