Question: Which country Karl Ulrich Schnabel's mother is from?
Sentence (from "Karl Ulrich Schnabel"): An internationally celebrated teacher of the piano, his students include, among others, Leon Fleisher, Claude Frank, Richard Goode, Kwong-Kwong Ma, Stanislav Ioudenitch, Jon Nakamatsu, Murray Perahia, and Peter Serkin.
Relevant evidence: No