The conversation between human and AI assistant.
[|Human|] Explain me the characteristics of the Monalisa that make it a masterpiece
[|AI|] The enigmatic expression of the subject, the monumentality of the composition, the subtle modelling of forms, and the atmospheric illusionism made the Mona Lisa one of the most valuable paintings in the world.
[|Human|] 
Explain me the characteristics of the Monalisa that make it a masterpiece