No world's best-known artworks are portraits.
The Mona Lisa is one of the world's best-known artworks. The Mona Lisa is a portrait painted by Leonardo da Vinci. Leonardo da Vinci was a scientist and painter. Painting genres are history, portrait, animal, landscape, and still life.
Painting(monaLisa) ∧ WorldsBestKnown(monaLisa) PaintedBy(monaLisa, leonardodaVinci) ∧ Portrait(monaLisa) Scientist(leonardodaVinci) ∧ Painter(leonardodaVinci) ∀x (Painting(x) → (History(x) ∨ Portrait(x) ∨ Animal(x) ∨ Landscape(x) ∨ StillLife(x)))