{
    "byline": "[Submitted on 9 Apr 2018 (v1), last revised 2 Jul 2018 (this version, v4)]",
    "charset": "UTF-8",
    "dir": null,
    "excerpt": "View PDF\n    HTML (experimental)",
    "lang": null,
    "length": 1020,
    "publishedTime": null,
    "siteName": null,
    "title": ""
}