<｜begin▁of▁sentence｜>### Instruction:
As a medical researcher conducting a study on the spread of infectious diseases within a population of 500 individuals, you have collected data to create a network of interactions among them using the erdos_renyi_graph from the networkx library. Now, you are interested in using the SpikyBallSampler to extract a subgraph representing a selected group of 60 individuals. Could you provide the list of nodes that were sampled from the larger network using this method?
### Response:
import networkx as nx
from littleballoffur import SpikyBallSampler

G = nx.gnp_random_graph(n=500, p=0.15)
sampler = SpikyBallSampler(60, sampling_probability=0.2, initial_nodes_ratio=0.15, seed=42, max_hops=100000, mode='fireball')
sampler_G = sampler.sample(G)
print(sampler_G.nodes())
<|EOT|>
