input:  Now, answer this question: Title: You gotta be kidding. Review: Are you serious? This has to be the stupidest Christmas song of all time. Listen to the lyrics. "Last Christmas I gave you my heart, but you gave it away the very next day." What is that supposed to mean? Meaningless drivel from a convicted pervert isn't the exactly appropriate to the season. Is this product review negative?
A:
output: Yes

input:  Now, answer this question: Title: Nice backjumping in Middle Age Review: This book accomplishes a very hard task in the easy way. Historical novels, in my opinion, have to unveil history by means of a plot with a clear historical setting. So the plot itself is secondary and the historical description catches readers' attention. After Eco's and Follet's this is another piece of history that we can learn about in the comfort of our armchair Is this product review negative?
A:
output: No

input:  Now, answer this question: Title: Comfortable to wear, hard to use music player Review: The backpack is great. The buttons on the iPod controller stick or sometimes don't work at all. I am sending mine back for a replacement. Is this product review negative?
A:
output: