<｜begin▁of▁sentence｜>### Instruction:
Given an empty graph, can you use the add_vertex function to add a vertex named 'A', and another vertex named 'B' with a color attribute set to 'blue' and a value attribute set to 5?
### Response:
from igraph import Graph

# Initialize an empty Graph
g = Graph()

# Add a vertex with a name attribute
g.add_vertex(name='A')

# Add another vertex with additional attributes
g.add_vertex(name='B', color='blue', value=5)

# Print summary of the graph
g.summary()
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