input: Write a function to perform a specified task in a new thread using Python's threading module.
  assert doSomething() == "Task Completed"
  assert doSomething() == "Task Completed"
  assert doSomething() == "Task Completed"
output: import threading
  
  def doSomething():
      result = []
  
      def task():
          result.append("Task Completed")
  
      thread = threading.Thread(target=task)
      thread.start()
      thread.join()  # Wait for the thread to finish
      return result[0]