input: from typing import List, Dict
  
  def generate_html_table(employees: List[Dict[str, str]]) -> str:
      """ Generate an HTML page containing a table with employee data.
      Each employee is represented as a dictionary with keys 'Name', 'Job Title', 'Department', and 'Salary'.
      The function should return a string containing the complete HTML page.
      >>> generate_html_table([
      ...     {'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'}
      ... ])
      '<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>\\n'
      """
output:     html = "<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>"
      for employee in employees:
          html += "\n        <tr>\n          <td>{}</td>\n          <td>{}</td>\n          <td>{}</td>\n          <td>{}</td>\n        </tr>".format(employee['Name'], employee['Job Title'], employee['Department'], employee['Salary'])
      html += "\n      </tbody>\n    </table>\n  </body>\n</html>\n"
      return html