input: Write a python function to create instances of the Employee class and return a list of their names.
  assert get_employee_names([('John', 50000, 28), ('Jane', 60000, 32), ('Doe', 45000, 25)]) == ['John', 'Jane', 'Doe']
  assert get_employee_names([('Alice', 75000, 29), ('Bob', 52000, 34)]) == ['Alice', 'Bob']
  assert get_employee_names([('Charlie', 67000, 30)]) == ['Charlie']
output: class Employee:
      def __init__(self, name, salary, age):
          self.name = name
          self.salary = salary
          self.age = age
  
  def get_employee_names(employee_data):
      employees = [Employee(name, salary, age) for name, salary, age in employee_data]
      return [employee.name for employee in employees]