Deserializing JSON to VB.NET List(Of List(Of String))

I am using Newtonsoft JSON DLL, to Deserialize a JSON String retrieved from a URL, into a VB.NET Class object. Everything works until I get to the following JSON path:

"breadcrumbs":[
[
"ABC"
],
 "DEF",
 "GHI",
 "JKL"
],

My Class property is as follows:

Private m_breadcrumbs As List(Of List(Of String))

Public Property breadcrumbs() As List(Of List(Of String))

    Get
        Return m_breadcrumbs
    End Get

    Set(value As List(Of List(Of String)))
        m_breadcrumbs = value
    End Set

End Property

I am seeing the following exception: Error converting value "DEF" to type 'System.Collections.Generic.List1[System.String]'

My question is, what can I change in my Class object to allow it to consume this JSON structure? (NOTE: the JSON structure in the example code above is EXACTLY what is being returned in the JSON string.)