Conversation so far:
Can you provide me with a little more information on Jean-Philippe Rameau's instrumental music?
Jean-Philippe Rameau was a master of the 18th-century French school of harpsichord music and made a break with the style of the first generation of harpsichordists.
Was Jean-Philippe Rameau successful as a master of the French School of harpsichord?
Jean-Philippe Rameau's mastery had reached its apogee in the first decade of the 18th century with collections of pieces by Louis Marchand, Gaspard Le Roux, and Louis-Nicolas Clérambault.

Question: Can you tell me how many people were apart of the French school?
Self-contained rewrite: Can you tell me how many people were a part of the Jean-Philippe Rameau French School of harpsichord?