content-change(Root Type for content_change)

{
    "element": "h1",
    "state_from": "missing",
    "state_to": "partialy-present",
    "content_from": "Zaitoun",
    "content_to": "The Book of Good Food",
    "full_occurences": 0,
    "partial_occurences": 1,
    "full_occurences_change": 0,
    "partial_occurences_change": -1
}