Step 1
Objects: Sign, Wall, Text 'Rosehill'

Step 2
General Objects: Sign, Wall
Text in the Image: Text 'Rosehill'
Objects that specifically refer to the Proper Noun of the Real World: N/A

Step 3
triplets: [Sign, General Objects, is on, Wall, General Objects][Text 'Rosehill', Text in the Image, is on, Sign, General Objects][Wall, General Objects, supports, Sign, General Objects]

Step 4
(1) Node with max degree: Sign.
(2) Location of Sign: [Center of the canvas].
(3) Location of Wall, Text 'Rosehill': Wall: [Background, spanning the entire image]; Text 'Rosehill': [Centered on the Sign].

Step 5
Bounding Boxes of the Objects:
Sign, General Objects: [0.200, 0.400, 0.800, 0.600] - Positioned centrally in the image.
Text 'Rosehill', Text in the Image: [0.300, 0.450, 0.700, 0.550] - Centered on the Sign.
Wall, General Objects: [0.000, 0.000, 1.000, 1.000] - Background, spanning the entire image.

Step 6
{"Sign": {"phrase": "Sign","coordinates": [0.200, 0.400, 0.800, 0.600]},"Text Rosehill": {"phrase": "Text 'Rosehill'","coordinates": [0.300, 0.450, 0.700, 0.550]},"Wall": {"phrase": "Wall","coordinates": [0.000, 0.000, 1.000, 1.000]}}