Step 1
Objects: Black Headphones, Green Phone

Step 2
General Objects: Black Headphones, Green Phone
Text in the Image: N/A
Objects that specifically refer to the Proper Noun of the Real World: N/A

Step 3
triplets: [Black Headphones, General Objects, are next to, Green Phone, General Objects]

Step 4
(1) Node with max degree: Black Headphones. (2) Location of Black Headphones: [Center-left of the canvas]. (3) Location of Green Phone: [Immediately to the right of the Black Headphones].

Step 5
Bounding Boxes of the Objects:
Black Headphones, General Objects: [0.200, 0.400, 0.500, 0.600] - Positioned in the center-left of the canvas.
Green Phone, General Objects: [0.510, 0.400, 0.810, 0.600] - Positioned immediately to the right of the Black Headphones.

Step 6
{
  "Black Headphones": {
    "phrase": "Black Headphones",
    "coordinates": [0.200, 0.400, 0.500, 0.600]
  },
  "Green Phone": {
    "phrase": "Green Phone",
    "coordinates": [0.510, 0.400, 0.810, 0.600]
  }
}