( Leadhillite ( ( is ( ( ( a ( lead ( sulfate ( carbonate ( hydroxide mineral ) ) ) ) ) , ) ( often ( associated ( with anglesite ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Leadhillite)) (VP (VBZ is) (NP (NP (DT a) (JJ lead) (JJ sulfate) (NN carbonate) (NN hydroxide) (NN mineral)) (, ,) (VP (ADVP (RB often)) (VBN associated) (PP (IN with) (NP (NN anglesite)))))) (. .)))
Leadhillite is a lead sulfate carbonate hydroxide mineral, often associated with anglesite.
(ROOT (S (NP (JJ Carbonate) (NNS minerals)) (VP (VBP are) (ADVP (RB often)) (VP (VBN found) (SBAR (WHADVP (WRB where)) (S (NP (NNS seas)) (ADVP (RB once)) (VP (VBD covered) (NP (DT the) (NN land))))))) (. .)))