p(
   text("Hello "),
   text("world").sub(),
   text(", what's "),
   text("up").sup(),
   text("?")
)

{
    "type": "paragraph",
    "content": [
        {
            "type": "text",
            "text": "Hello "
        },
        {
            "type": "text",
            "text": "world",
            "marks": [
                {
                    "type": "subsup",
                    "attrs": {
                        "type": "sub"
                    }
                }
            ]
        },
        {
            "type": "text",
            "text": ", what's "
        },
        {
            "type": "text",
            "text": "up",
            "marks": [
                {
                    "type": "subsup",
                    "attrs": {
                        "type": "sup"
                    }
                }
            ]
        },
        {
            "type": "text",
            "text": "?"
        }
    ]
}