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Regular Expression
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"([\w\d]+?_.*?)":
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Input 1
New
[{"elements": [{"content_": 1378013227, "x": 0, "msg_id": 2050589, "type": "label-d", "y": 0.0}, {"content": [{"y": 48.0, "text": "goodbye\u6c55\u5934!\u6df1\u5733,\u6211\u4eec\u56de\u6765\u4e86!", "x": [28.0, 35.0, 42.0, 49.0, 56.0, 63.0, 70.0, 76.21, 90.21, 104.21, 111.21, 125.21, 139.21, 146.21, 160.21, 174.21, 188.21, 202.21, 216.21]}], "msg_id": 2050589, "type": "text"}, {"content": "http://mmsns.qpic.cn/mmsns/szVicub5nnDy1GTk8V2b8flSkzOiadia5betOM3icQoiaSx3zoCV2vJEaag/0#1136x852", "w": 120.0, "h": 90, "y": 48, "x": 306.0, "msg_id": 2050589, "type": "image", "id": 2050590}, {"content": "http://mmsns.qpic.cn/mmsns/szVicub5nnDy1GTk8V2b8flSkzOiadia5beGFKSZWUU8HpwNibJ3RsYIIg/0#1136x852", "w": 120.0, "h": 90, "y": 143, "x": 306.0, "msg_id": 2050589, "type": "image", "id": 2050593}, {"content": "http://mmsns.qpic.cn/mmsns/szVicub5nnDy1GTk8V2b8flSkzOiadia5bet0fhtRd93LN1XjFcF6sHZA/0#1136x852", "w": 120.0, "h": 90, "y": 143, "x": 181.0, "msg_id": 2050589, "type": "image", "id": 2050592}, {
Extraction
[{"elements": [{"content_": 1378013227, "x": 0, "msg_id": 2050589, "type": "label-d", "y": 0.0}, {"content": [{"y": 48.0, "text": "goodbye\u6c55\u5934!\u6df1\u5733,\u6211\u4eec\u56de\u6765\u4e86!", "x": [28.0, 35.0, 42.0, 49.0, 56.0, 63.0, 70.0, 76.21, 90.21, 104.21, 111.21, 125.21, 139.21, 146.21, 160.21, 174.21, 188.21, 202.21, 216.21]}], "msg_id": 2050589, "type": "text"}, {"content": "http://mmsns.qpic.cn/mmsns/szVicub5nnDy1GTk8V2b8flSkzOiadia5betOM3icQoiaSx3zoCV2vJEaag/0#1136x852", "w": 120.0, "h": 90, "y": 48, "x": 306.0, "msg_id": 2050589, "type": "image", "id": 2050590}, {"content": "http://mmsns.qpic.cn/mmsns/szVicub5nnDy1GTk8V2b8flSkzOiadia5beGFKSZWUU8HpwNibJ3RsYIIg/0#1136x852", "w": 120.0, "h": 90, "y": 143, "x": 306.0, "msg_id": 2050589, "type": "image", "id": 2050593}, {"content": "http://mmsns.qpic.cn/mmsns/szVicub5nnDy1GTk8V2b8flSkzOiadia5bet0fhtRd93LN1XjFcF6sHZA/0#1136x852", "w": 120.0, "h": 90, "y": 143, "x": 181.0, "msg_id": 2050589, "type": "image", "id": 2050592}, {