Step 1
Objects: Blue Water Bottle, Red Backpack

Step 2
General Objects: Blue Water Bottle, Red Backpack
Text in the Image: N/A
Objects that specifically refer to the Proper Noun of the Real World: N/A

Step 3
triplets: [Blue Water Bottle, General Objects, is on top of, Red Backpack, General Objects]

Step 4
(1) Node with max degree: Red Backpack.
(2) Location of Red Backpack: [Center of the canvas].
(3) Location of Blue Water Bottle: [On top of the Red Backpack, slightly towards the center].

Step 5
Bounding Boxes of the Objects:
Red Backpack, General Objects: [0.200, 0.300, 0.800, 0.900] - Positioned centrally in the image.
Blue Water Bottle, General Objects: [0.400, 0.100, 0.600, 0.300] - Positioned on top of the backpack, aligning centrally but towards the upper part of the canvas.

Step 6
{"Red Backpack": {"phrase": "Red Backpack","coordinates": [0.200, 0.300, 0.800, 0.900]},
 "Blue Water Bottle": {"phrase": "Blue Water Bottle","coordinates": [0.400, 0.100, 0.600, 0.300]}}