A product recovery system uses a piece of technology called a 'pig'.

"That gift is just a piece of paper called a marriage license."

He didn't want her enough to risk that piece of ice he called a heart.

That piece of paper called money or the physical product?

This piece also calls upon the resurrection Pope's style of writing.

Each piece calls for a different kind of attention.

They just want a piece of land to call their own.

"The piece calls for actors to call on their art form - and to fire the audience's imagination."

The piece called for the remaining independents to side with the Coalition.