( ( ( The ( ( thickness and ) thinness ) ) ( of ( the magma ) ) ) ( ( will ( determine ( ( ( how ( ( a volcano ) ( will erupt ) ) ) and ) ( ( ( what kind ) ( of ( a cone ) ) ) ( will form ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN thickness) (CC and) (NNS thinness)) (PP (IN of) (NP (DT the) (NN magma)))) (VP (MD will) (VP (VB determine) (SBAR (SBAR (WHADVP (WRB how)) (S (NP (DT a) (NN volcano)) (VP (MD will) (VP (VB erupt))))) (CC and) (SBAR (WHNP (WP what) (NN kind) (PP (IN of) (NP (DT a) (NN cone)))) (S (VP (MD will) (VP (VB form)))))))) (. .)))
The thickness and thinness of the magma will determine how a volcano will erupt and what kind of a cone will form.
(ROOT (S (NP (NP (DT The) (NN thickness)) (PP (IN of) (NP (NN magma)))) (VP (VBZ determines) (SBAR (IN whether) (S (NP (DT a) (JJ volcanic) (NN eruption)) (VP (MD will) (VP (VB be) (ADJP (JJ explosive))))) (CC or) (RB not))) (. .)))