Paraphrasing Complex Ideas

Paraphrase the following excerpts from the article. Do not worry if there are some words you do not understand. Just state the main point briefly in simple, direct words.

1		According to art critic and theorist Katie Segal, conceptual art is not a movement, like, for example, impressionism, minimalism, or surrealism, instead, it is shift in emphasis from the visual to the intellectual, from object to concept.
2		Duchamp, by using everyday objects you would find around the house or at a department store, was denying the commodification of art, removing its material value altogether.
3		Accompanying the series were certificates of documentation and ownership (not on display) stipulating that the pieces could be made and remade for exhibitions as necessary.
4		The viewer often becomes implicated in the piece instead of being a mere observer.
5		The installation could have easily been called To Hear, as the motion of spectators running their hands over the table triggers a layering of pre-recorded voices and familiar sounds.