Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Historical only, really

Furtwangler is fine and Greindl is amazing even if you don't add points for his youth--mid-thirties! But Jaro Prohashka, well, sucks. He's the third-worst Sachs I've ever heard, better only than Fischer-Dieskau and Jose van Dam. He desperately needs a German language coach. Max Lorenz fails utterly to demonstrate how his singing kept him out of the concentration camps! His singing lacks line. I don't know what Herr Goebbels saw in him.