( ( Volt ( ( amperes and ) watts ) ) ( ( describe ( ( electrical ( ( potential and ) measurements ) ) ( of ( units ( of power ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Volt) (NNS amperes) (CC and) (NNS watts)) (VP (VBP describe) (NP (NP (JJ electrical) (NN potential) (CC and) (NNS measurements)) (PP (IN of) (NP (NP (NNS units)) (PP (IN of) (NP (NN power))))))) (. .)))
Volt amperes and watts describe electrical potential and measurements of units of power.
(ROOT (S (NP (NP (DT The) (NN difference)) (PP (IN in) (NP (NP (JJ electric) (JJ potential) (NN energy)) (SBAR (WHNP (WDT which)) (S (VP (VBZ allows) (PP (IN for) (NP (DT an) (JJ electric) (NN charge))) (S (VP (TO to) (VP (VB move) (PP (IN from) (NP (CD one) (NN position))) (PP (TO to) (NP (DT another)))))))))))) (VP (VBZ is) (VP (VBN measured) (PP (IN by) (NP (DT the) (JJ volt) (NN si) (NN unit))))) (. .)))