Step 1
Objects: Green Plant, White Bookshelf

Step 2
General Objects: Green Plant, White Bookshelf
Text in the Image: N/A
Objects that specifically refer to the Proper Noun of the Real World: N/A

Step 3
triplets: [Green Plant, General Objects, is on top of, White Bookshelf, General Objects]

Step 4
(1) Node with max degree: White Bookshelf.
(2) Location of White Bookshelf: [Spanning the entire right side of the canvas].
(3) Location of Green Plant: [On top of the White Bookshelf, towards the upper right of the canvas].

Step 5
Bounding Boxes of the Objects:
White Bookshelf, General Objects: [0.500, 0.100, 0.900, 0.900] - The bookshelf occupies the right side of the canvas, extending vertically.
Green Plant, General Objects: [0.650, 0.100, 0.750, 0.200] - The plant is placed on top of the bookshelf, positioned towards the upper right.

Step 6
{
  "White Bookshelf": {
    "phrase": "White Bookshelf",
    "coordinates": [0.500, 0.100, 0.900, 0.900]
  },
  "Green Plant": {
    "phrase": "Green Plant",
    "coordinates": [0.650, 0.100, 0.750, 0.200]
  }
}