ldc = 
labelDefinitionCreator contains the following labels:

	Vehicle with 0 sublabels and 3 attributes and belongs to None group.	(info)
	Pedestrian with 0 sublabels and 0 attributes and belongs to None group.	(info)
	LaneMarker with 0 sublabels and 2 attributes and belongs to None group.	(info)
	TrafficLight with 1 sublabels and 0 attributes and belongs to None group.	(info)

For more details about attributes and sublabels, use the info method.

trafficStruct = struct with fields:
           Name: "TrafficLight"
           Type: Rectangle
     LabelColor: {''}
          Group: "None"
     Attributes: []
      Sublabels: "Light"
    Description: 'Mark a tight bounding box around the traffic light. Use the sublabels to mark each individual light'

lightStruct = struct with fields:
           Name: "Light"
           Type: Rectangle
     Attributes: ["Active"    "Color"]
      Sublabels: []
    Description: 'Mark a tight bounding box around each light.'

colorStruct = struct with fields:
           Name: "Color"
           Type: List
      ListItems: {3x1 cell}
    Description: 'Specify the color of the light as one of Red, Yellow (amber) or Green.'

ans = 3x1 cell
    {'Red'   }
    {'Yellow'}
    {'Green' }