input: Write a function to create a Text-to-Speech Python application that reads out a given sentence using the pyttsx3 library. The function should accept a sentence as input and use the Text-to-Speech engine to say and execute the sentence. If the function is called with the sentence "Hello, this is a simple sentence", it should initiate the Text-to-Speech process to read the sentence aloud.
  
  assert text_to_speech("Hello, this is a simple sentence")
  assert text_to_speech("Python is fun")
  assert text_to_speech("Text-to-Speech is amazing")
  assert text_to_speech("Let's convert text to speech")
  assert text_to_speech("Hello World")
output: import pyttsx3
  
  def text_to_speech(sentence):
      engine = pyttsx3.init()
      engine.say(sentence)
      engine.runAndWait()
      return True