The document introduces three individuals - Pierre, Anna, and Mario. Pierre is 17 years old, lives in Paris, France, has short straight dark hair and brown eyes, is quite tall and slim, loves playing computer games and tennis. Anna is 11 years old, lives in Moscow, Russia, has long straight blonde hair and green eyes, is quite short and likes skiing and playing the piano. Mario is 26 years old, lives in Florence, Italy, is tall and well-built with brown wavy hair and brown eyes, likes playing the guitar and dancing, and can speak French.