problem: Generate a short movie review that has positive sentiment.
generated: does a good job

problem: Generate a short movie review that has negative sentiment.
generated: hmmm ... might i suggest that the wayward wooden one end it all by stuffing himself into an electric pencil sharpener ?

problem: Generate a short movie review that has positive sentiment.
generated: remarkable

problem: Generate a short movie review that has positive sentiment.
generated:
enormous