( ( ( A review ) ( of ( ( ( hundreds ( of ( nutrient solutions ) ) ) and ) ( ( all greenhouse ) ( growing systems ) ) ) ) ) ( ( showed ( ( one thing ) ( in ( ( ( ( common , ) ( ( the absence ) ( of silicon ) ) ) and ) ( ( a range ) ( of ( other ( ( naturally occurring ) elements ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT A) (NN review)) (PP (IN of) (NP (NP (NP (NNS hundreds)) (PP (IN of) (NP (JJ nutrient) (NNS solutions)))) (CC and) (NP (NP (DT all) (NN greenhouse)) (VP (VBG growing) (NP (NNS systems))))))) (VP (VBD showed) (NP (NP (CD one) (NN thing)) (PP (IN in) (NP (NP (JJ common)) (, ,) (NP (NP (DT the) (NN absence)) (PP (IN of) (NP (NN silicon)))) (CC and) (NP (NP (DT a) (NN range)) (PP (IN of) (NP (JJ other) (ADJP (RB naturally) (VBG occurring)) (NNS elements)))))))) (. .)))
A review of hundreds of nutrient solutions and all greenhouse growing systems showed one thing in common, the absence of silicon and a range of other naturally occurring elements.
(ROOT (S (S (VP (VBG Using) (NP (NNS nutrients) (CC and) (VBG growing)))) (VP (VBP are) (ADJP (JJ common) (PP (TO to) (NP (DT all) (VBG living) (NNS things))))) (. .)))
Using nutrients and growing are common to all living things.