Subgraph II

# Extract the nodes of interest: nodes
nodes = [n for n, d in ____ if ____ == ____]

# Create the set of nodes: nodeset
nodeset = set(nodes)

# Iterate over nodes
for n in ____:

    # Compute the neighbors of n: nbrs
    nbrs = ____

    # Compute the union of nodeset and nbrs: nodeset
    nodeset = nodeset.union(nbrs)

# Compute the subgraph using nodeset: T_sub
T_sub = ____

# Draw T_sub to the screen
____
plt.show()