Conversation so far:
What did Daniel Barenboim write in his biography?
Did Daniel Barenboim have any siblings?
Where did Daniel Barenboim go to school?
In the summer of 1954, Daniel Barenboim's parents took him to Salzburg to take part in Igor Markevitch's conducting classes.
Where did Daniel Barenboim attend after his conducting classes?
In 1955 Daniel Barenboim studied harmony and composition with Nadia Boulanger in Paris.

Question: Did he get good grades?
Self-contained rewrite: Did Daniel Barenboim get good grades?