input: Generate a short movie review that has "positive" sentiment.

output: serenity

input: Generate a short movie review that has "negative" sentiment.

output: no explanation or even plot relevance

input: Generate a short movie review that has "positive" sentiment.

output: , sum up the strange horror of life in the new millennium

input: Generate a short movie review that has "negative" sentiment.

output:
the lack of naturalness makes everything seem self-consciously poetic and forced ... it 's a pity that ( nelson 's ) achievement does n't match his ambition .