input: from typing import List
  
  
  def generate_employee_table(employees: List[dict]) -> str:
      """ Generate an HTML page containing a table with employee data.
      Each employee is represented by a dictionary with keys 'Name', 'Job Title', 'Department', and 'Salary'.
      The function returns a string that is the HTML source of the generated page.
      Example:
      employees = [
          {'Name': 'John Doe', 'Job Title': 'Senior Developer', 'Department': 'IT', 'Salary': '$120,000'},
          {'Name': 'Jane Doe', 'Job Title': 'Manager', 'Department': 'Finance', 'Salary': '$95,000'},
          {'Name': 'Tim Smith', 'Job Title': 'Junior Developer', 'Department': 'IT', 'Salary': '$55,000'}
      ]
      >>> generate_employee_table(employees)
      '<html>\n  <head>\n    <title>Employee Data</title>\n  </head>\n  <body>\n    <table>\n      <thead>\n        <tr>\n          <th>Name</th>\n          <th>Job Title</th>\n          <th>Department</th>\n          <th>Salary</th>\n        </tr>\n      </thead>\n      <tbody>\n        <tr>\n          <td>John Doe</td>\n          <td>Senior Developer</td>\n          <td>IT</td>\n          <td>$120,000</td>\n        </tr>\n        <tr>\n          <td>Jane Doe</td>\n          <td>Manager</td>\n          <td>Finance</td>\n          <td>$95,000</td>\n        </tr>\n        <tr>\n          <td>Tim Smith</td>\n          <td>Junior Developer</td>\n          <td>IT</td>\n          <td>$55,000</td>\n        </tr>\n      </tbody>\n    </table>\n  </body>\n</html>'
      """
      html_content = '<html>\n  <head>\n    <title>Employee Data</title>\n  </head>\n  <body>\n    <table>\n      <thead>\n        <tr>\n          <th>Name</th>\n          <th>Job Title</th>\n          <th>Department</th>\n          <th>Salary</th>\n        </tr>\n      </thead>\n      <tbody>\n'
      
      for employee in employees:
          html_content += f'        <tr>\n          <td>{employee["Name"]}</td>\n          <td>{employee["Job Title"]}</td>\n          <td>{employee["Department"]}</td>\n          <td>{employee["Salary"]}</td>\n        </tr>\n'
      
      html_content += '      </tbody>\n    </table>\n  </body>\n</html>'
      return html_content
output:     for employee in employees:
          html_content += f'        <tr>\n          <td>{employee["Name"]}</td>\n          <td>{employee["Job Title"]}</td>\n          <td>{employee["Department"]}</td>\n          <td>{employee["Salary"]}</td>\n        </tr>\n'
      
      html_content += '      </tbody>\n    </table>\n  </body>\n</html>'
      return html_content