Step 1
Objects: Blue Bowl, White Placemat

Step 2
General Objects: Blue Bowl, White Placemat
Text in the Image: N/A
Objects that specifically refer to the Proper Noun of the Real World: N/A

Step 3
triplets: [Blue Bowl, General Objects, is on top of, White Placemat, General Objects]

Step 4
(1) Node with max degree: White Placemat. 
(2) Location of White Placemat: [Center of the canvas].
(3) Location of Blue Bowl: [Centered directly above the White Placemat].

Step 5
Bounding Boxes of the Objects:
Blue Bowl, General Objects: [0.400, 0.400, 0.600, 0.600] - Positioned centrally above the placemat.
White Placemat, General Objects: [0.300, 0.500, 0.700, 0.700] - Positioned at the center of the canvas.

Step 6
{
  "Blue Bowl": {
    "phrase": "Blue Bowl",
    "coordinates": [0.400, 0.400, 0.600, 0.600]
  },
  "White Placemat": {
    "phrase": "White Placemat",
    "coordinates": [0.300, 0.500, 0.700, 0.700]
  }
}