They show paintings.
Paintings are shown.
They show visitors around.
Visitors are shown around.
They introduce new artists.
New artists are introduced.
They answer my question
My question is answered.
They hold exhibitions.
Exhibitions are held.
James Cook discovered Antarctica
Antarctica was discovered by James Cook.
Vincent van Gogh painted "Starry night"
Van Gogh painted "Starry Night".
The Mayans built Chichén Itzá.
Chichén Itzá was built by the Mayans.
