<｜begin▁of▁sentence｜>### Instruction:
As an Adventure Guide leading a group of tourists on a hiking expedition through various national parks in the United States, you come across a detailed map of American College football networks stored in a GML file named football.gml. To enhance the exploratory experience for your group, you are interested in utilizing the Louvain function in `cdlib` to detect different communities within the network graph representing college football teams. Following this analysis, you aim to identify the size, representing the number of nodes, in each community to gain insights into the interconnectedness and groupings within the football network.
### Response:
import networkx as nx
from cdlib import algorithms, evaluation

# Read the American College football network graph
G = nx.read_gml('football.gml')

# Perform community detection using the Louvain algorithm
communities = algorithms.louvain(G)

# Compute the size of the detected communities
community_sizes = evaluation.size(G, communities)

# Print the community sizes
print(community_sizes)
<|EOT|>
