Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Wassenaar Review

Sonya Kitchell played at the North Sea Jazz Fetival this summer(2007). She was absolutely phenomenal, and so was her band. They played so tighly together and clearly enjoyed themselves. Her pianist is a genius too. There hung an atmosphere of sensitivity and collaboration. She has a unique style with a warm intonation and a voice with suspense. Yes, suspense! She sometimes speaks as if reading a poem in rhythm,to flow the next second into singing. One could hear a pin drop at the North Sea Jazz Festival! Keep Going Sonya!