( ( ( The rock ) ( which ( ( does not ) ( ( contain ( ( an ( adequate percentage ) ) ( of ( ore minerals ) ) ) ) ( to ( ( be ( economically valuable ) ) ( as ( ( a source ) ( of ( these minerals ) ) ) ) ) ) ) ) ) ) ( ( is ( called WASTE ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN rock)) (SBAR (WHNP (WDT which)) (S (VP (VBZ does) (RB not) (VP (VB contain) (NP (NP (DT an) (JJ adequate) (NN percentage)) (PP (IN of) (NP (NN ore) (NNS minerals)))) (S (VP (TO to) (VP (VB be) (ADJP (RB economically) (JJ valuable)) (PP (IN as) (NP (NP (DT a) (NN source)) (PP (IN of) (NP (DT these) (NNS minerals))))))))))))) (VP (VBZ is) (VP (VBN called) (ADVP (RB WASTE)))) (. .)))
The rock which does not contain an adequate percentage of ore minerals to be economically valuable as a source of these minerals is called WASTE.
(ROOT (S (NP (JJ Ores) (NN rock)) (VP (VBZ contains) (NP (NP (NNS concentrations)) (PP (IN of) (NP (JJ valuable) (NNS minerals))))) (. .)))