Is there a way to get the indicies of object/relation/subect in extracted triples?

[Pwgeorge-Py]

Ideally obtaining something like:

{
  "facts": [
    {
      "subject": ["Obama", 0, 5],
      "predicate": ["visited", 6, 13],
      "object": ["white house", 18, 29]
    }
  ]
}

Dont see how you could do this by searching the input string, as sentences with repeated words might give the incorrect index.

is there a way to do this within minie?