<｜begin▁of▁sentence｜>### Instruction:
As a childbirth educator, you support expectant parents by providing classes and information on pregnancy, childbirth, and newborn care. In the context of NetworkX, imagine a scenario where you are assisting a group of expectant parents who are interested in visualizing the growth of their social support network as new parents. They have collected data on their connections and interactions as a graph with nodes representing individuals and edges representing interactions. In this context, you want to guide them in using NetworkX to calculate the bounding box of the graph's layout and then advise them on contracting this bounding box by specific margins in order to create a more visually appealing representation of their social support network during the early stages of parenthood.
### Response:
import networkx as nx

# Create a graph
g = nx.Graph()
g.add_edges_from([(1,2), (2,3), (3,4), (4,5)])

# Calculate the bounding box of a position layout
pos = nx.spring_layout(g)
bb = nx.utils.BoundingBox(pos.values())

# Contract the bounding box by some margins (dx and dy)
dx, dy = 0.1, 0.1
contracted_bb = bb.contract(dx, dy)

print(f'Original BoundingBox: {bb}')
print(f'Contracted BoundingBox: {contracted_bb}')
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