Original: In 1836 , at a party hosted by Countess Marie d'Agoult , mistress of friend and fellow composer Franz Liszt , Chopin met French author and feminist Amandine Aurore Lucille Dupin , the Baroness Dudevant , better known by her pseudonym , George Sand .
Simplified: At about this time Chopin met the woman writer Amandine-Aurore-Lucile Dupin , the Baroness Dudevant , better known as George Sand .