Silverwork and Pewter
( ( Silverwork and ) Pewter )
(ROOT (NP (NN Silverwork) (CC and) (NN Pewter)))
Silvework and Petwer are related.
( ( ( Silvework and ) Petwer ) ( ( are related ) . ) )
(ROOT (S (NP (NNP Silvework) (CC and) (NNP Petwer)) (VP (VBP are) (ADJP (VBN related))) (. .)))