Step 1
Objects: White Hydrant, Snowy Sidewalk, Red Building

Step 2
General Objects: White Hydrant, Snowy Sidewalk, Red Building
Text in the Image: N/A
Objects that specifically refer to the Proper Noun of the Real World: N/A

Step 3
triplets: [White Hydrant, General Objects, is on, Snowy Sidewalk, General Objects][Snowy Sidewalk, General Objects, supports, White Hydrant, General Objects][White Hydrant, General Objects, is in front of, Red Building, General Objects][Red Building, General Objects, is behind, White Hydrant, General Objects]

Step 4
(1) Node with max degree: White Hydrant.
(2) Location of White Hydrant: [Center of the canvas].
(3) Location of Snowy Sidewalk, Red Building: 
Snowy Sidewalk: [Spanning the lower part of the canvas, beneath the Hydrant];
Red Building: [Background, directly behind the Hydrant].

Step 5
Bounding Boxes of the Objects:
White Hydrant, General Objects: [0.450, 0.400, 0.550, 0.600] - Located centrally in the image.
Snowy Sidewalk, General Objects: [0.000, 0.600, 1.000, 1.000] - Covers the lower part of the canvas.
Red Building, General Objects: [0.000, 0.100, 1.000, 0.900] - Occupies the background, spanning almost the entire height but behind the hydrant.

Step 6
{
  "Hydrant": {"phrase": "White Hydrant", "coordinates": [0.450, 0.400, 0.550, 0.600]},
  "Sidewalk": {"phrase": "Snowy Sidewalk", "coordinates": [0.000, 0.600, 1.000, 1.000]},
  "Building": {"phrase": "Red Building", "coordinates": [0.000, 0.100, 1.000, 0.900]}
}