Step 1
Objects: a green school bus, a red bag

Step 2
General Objects: a green school bus, a red bag
Text in the Image: N/A
Objects that specifically refer to the Proper Noun of the Real World: N/A

Step 3
triplets: [a green school bus, General Objects, is near, a red bag, General Objects]
          [a red bag, General Objects, is near, a green school bus, General Objects]

Step 4
(1) Node with max degree: a green school bus.
(2) Location of a green school bus: [Center of the canvas].
(3) Location of a red bag: [Near the right side of the green school bus].

Step 5
Bounding Boxes of the Objects:
a green school bus, General Objects: [0.100, 0.200, 0.900, 0.800] - The bus occupies a central, large portion of the canvas.
a red bag, General Objects: [0.710, 0.600, 0.890, 0.790] - The bag is placed near the right side of the bus, slightly towards the lower part.

Step 6
{
  "School Bus": {"phrase": "a green school bus", "coordinates": [0.100, 0.200, 0.900, 0.800]},
  "Bag": {"phrase": "a red bag", "coordinates": [0.710, 0.600, 0.890, 0.790]}
}