Extraction: How to position span elements?

Hi,
after extraction, we sometimes have elements like these, where there is a parent with Text (here "NO") and a child which contains a part of the text, with different font properties (here "2", which should be "N2O" if combined). My question is: How can one combine such an inline element at the right position in the text-flow?

In the docs (Extract API | How Tos | PDF Extract API | Adobe PDF Services) I see:

• Text: Text for the element in UTF-8 format, only reported for text elements. When inline elements are reported separately from parent block element, then this value has references to those inline elements.

How can I see such a reference to the inline element? Or is this meant differently?

...
        {
          "Bounds": [
            211.8,
            333.0,
            222.9,
            398.5
          ],
          "Font": {
            "alt_family_name": "Times",
            "embedded": true,
            "encoding": "MacRomanEncoding",
            "family_name": "Times",
            "font_type": "Type1",
            "italic": false,
            "monospaced": false,
            "name": "...+Times-Roman",
            "subset": true,
            "weight": 400
          },
          "HasClip": true,
          "ObjectID": 93,
          "Page": 0,
          "Path": "//Document/Sect/P[15]/Sub[3]",
          "Rotation": 90.0,
          "Text": "NO ",
          "TextSize": 9.2,
          "attributes": {
            "Placement": "Block"
          }
        },
        {
          "Bounds": [
            215.7,
            339.7,
            222.9,
            344.5
          ],
          "Font": {
            "alt_family_name": "Times",
            "embedded": true,
            "encoding": "MacRomanEncoding",
            "family_name": "Times",
            "font_type": "Type1",
            "italic": false,
            "monospaced": false,
            "name": "...+Times-Roman",
            "subset": true,
            "weight": 400
          },
          "HasClip": true,
          "ObjectID": 94,
          "Page": 0,
          "Path": "//Document/Sect/P[15]/Sub[3]/StyleSpan",
          "Rotation": 90.0,
          "Text": "2 ",
          "TextSize": 6.4,
          "attributes": {
            "TextPosition": "Sup"
          }
        }
...