how do i get to paris cdg airport to paris montparnasse?

"Results": [
    {
        "TypeName": "LOC",
        "Text": "paris cdg airport",
        "Start": 16,
        "End": 33
    },
    {
        "TypeName": "LOC",
        "Text": "paris montparnasse",
        "Start": 37,
        "End": 55
    }
]