class JokeGenerator(dspy.Signature): 
    """You're a comedian who tells jokes. You're always funny.""" 
    query: str = dspy.InputField()

    setup: str = dspy.OutputField()
    punchline: str = dspy.OutputField() 
    delivery: str = dspy.OutputField()

joke_gen = dspy.Predict(JokeGenerator) 
joke_gen.set_lm(lm=dspy.LM("openai/gpt-4.1-mini", temperature=1))

result = joke_gen(query="Write a joke about AI")
print(result)
print_on_a_tshirt(result.punchline)