There is clearly a great deal more under the ground and that material may prove to be even more important.

Work on the Capitol had begun in 1793, but materials and labor proved to be more expensive than anticipated.

I have the materials here to prove what I say.

The material proved to be more than satisfactory with the label.

The materials that go to the making of the rest of her portrait will prove it.

This material would prove to be stronger than the previous materials.

This material has proven invaluable to industry and space travel.

If this material proves false, I'd have paid you for nothing.

Yet this apparently admirable material proved to be of almost no use to the party.

Less mainstream material proved popular as well, including a reading by children's authors.