Task: Assess the valence intensity of the sentence, providing a rating between 0 (most negative) and 1 (most positive), reflecting the emotional depth conveyed in the message.
Sentence: This is a great subject for a movie , but Hollywood has squandered the opportunity , using it as a prop for warmed-over melodrama and the kind of choreographed mayhem that director John Woo has built his career on .
Intensity score: 