input: Write a function that generates sample data for a web application using Python's faker library. The output should contain three columns of data: name, email, and age. The function should return a list of tuples, where each tuple contains a name, email, and age.
  from faker import Faker
  
  def generate_sample_data(num_entries):
      fake = Faker()
      return [(fake.name(), fake.email(), fake.random_int(min=18, max=60)) for _ in range(num_entries)]
  
  assert generate_sample_data(3) == [('John Doe', 'john.doe@example.com', 25), ('Jane Smith', 'jane.smith@example.org', 30), ('Alice Johnson', 'alice.johnson@example.net', 50)]
output: from faker import Faker
  
  def generate_sample_data(num_entries):
      fake = Faker()
      return [(fake.name(), fake.email(), fake.random_int(min=18, max=60)) for _ in range(num_entries)]