( ( In ( the ( first column ) ) ) ( , ( ( q ( -LRB- ( t -RRB- ) ) ) ( ( is ( ( the measure ) ( of ( ( ( cone ( tip pressure ) ) , ) ( ( expressed ( in Megapascals ) ) ( in ( the ( SI system ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (DT the) (JJ first) (NN column))) (, ,) (NP (NP (NN q)) (PRN (-LRB- -LRB-) (NP (NN t)) (-RRB- -RRB-))) (VP (VBZ is) (NP (NP (DT the) (NN measure)) (PP (IN of) (NP (NP (NN cone) (NN tip) (NN pressure)) (, ,) (VP (VBN expressed) (PP (IN in) (NP (NNP Megapascals))) (PP (IN in) (NP (DT the) (NNP SI) (NN system)))))))) (. .)))
In the first column, q(t) is the measure of cone tip pressure, expressed in Megapascals in the SI system.
(ROOT (S (NP (NNS Megapascals)) (VP (VBZ is) (NP (NP (DT the) (NN measure)) (PP (IN of) (NP (NN water) (NN potential))))) (. .)))