<｜begin▁of▁sentence｜>### Instruction:
As a structural engineer, you are designing a framework for a new multi-story building. The building needs a tree-like support structure with 5 main pillars, representing the vertices. Each pillar is directly connected to two smaller support pillars, representing the children vertices. To ensure the stability of the building, you need to calculate the eccentricity of the second main pillar. The eccentricity is a measure of how far the second pillar is from the farthest support pillar in terms of structural connection paths. To obtain the eccentricity value, you can use the NetworkX library, which provides an eccentricity method accessible from the vertex instance in the graph.
### Response:
from igraph import Graph

# Create a graph
g = Graph.Tree(5, 2) # A tree graph with 5 vertices and children having 2 edges each

# Select a vertex
vertex = g.vs[1]

# Find the eccentricity of the selected vertex
ecc = vertex.eccentricity()

# Print the eccentricity
print('Eccentricity of the vertex:', ecc)
<|EOT|>
