Step 1
Objects: Red Mug, Green Desk

Step 2
General Objects: Red Mug, Green Desk
Text in the Image: N/A
Objects that specifically refer to the Proper Noun of the Real World: N/A

Step 3
triplets: [Red Mug, General Objects, is on top of, Green Desk, General Objects]

Step 4
(1) Node with max degree: Green Desk. 
(2) Location of Green Desk: [Spanning the lower part of the canvas].
(3) Location of Red Mug: [Centered on the Green Desk, towards the upper part of the desk].

Step 5
Bounding Boxes of the Objects:
Green Desk, General Objects: [0.100, 0.600, 0.900, 0.900] - The desk occupies a significant horizontal space across the lower part of the canvas.
Red Mug, General Objects: [0.450, 0.500, 0.550, 0.600] - The mug is placed centrally on the desk, visible in the upper part of the desk.

Step 6
{"Green Desk": {"phrase": "Green Desk","coordinates": [0.100, 0.600, 0.900, 0.900]},
 "Red Mug": {"phrase": "Red Mug","coordinates": [0.450, 0.500, 0.550, 0.600]}}