sentences:  Dan was born in Indonesia, and worked as a warehouseman before discovering the artistic possibilities of rock along the San Francisco Bay shoreline and his emergent skill in manipulating them.Bill was initially inspired by rock piles he had seen on the Big Island of Hawaii, the cairns of the Inuit, and later by the work of Andy Goldsworthy.In 2004, he was featured on San Francisco public television station KQED as one of the artists in a show entitled "Collaborations with Nature".