Since then the group has not released any new material.

He did not release any new material until 15 Minutes, 10 years later.

The group has not released any new material since 2008.

They also plan to release new material in the future.

Since then no new material has been released by Head and little heard of him.

Could you find out if they have any plans to release new material?

However they did not become serious about releasing any material until much later.

It wasn't until 1973 that he released any further material.

In 2007 he began releasing material under his own name.

This material has never been released because of its bad production.