<｜begin▁of▁sentence｜>### Instruction:
As a nutritionist who assesses and advises individuals on dietary practices and nutrition goals, imagine you have a detailed list of key ingredients for a balanced meal - broccoli, chicken, quinoa, salmon, and spinach. Utilizing the NutritionalAnalysis software, you are required to pair broccoli with chicken, and quinoa with salmon, to create optimal combinations while ensuring spinach remains unmatched in this particular meal plan.
### Response:
from igraph import Graph, Matching

# Create a graph
graph = Graph()
graph.add_vertices(5)
graph.add_edges([(0, 1), (1, 2), (2, 3), (3, 4)])

# Create a Matching object
matching = Matching(graph)

# Define the matching vector where vertex 0 is matched with 1, and 2 with 3
matching_vector = [1, 0, 3, 2, -1]

# Set the matching
matching.matching = matching_vector

# Print the edges that are part of the matching set
print(matching)
<|EOT|>
