( ( Gravity ( Waves ( Just ( as ( ( an ( oscillating ( electric charge ) ) ) ( generates ( an ( electromagnetic wave ) ) ) ) ) ) ) ) ( , ( ( General Relativity ) ( ( predicts ( that ( ( an ( oscillating mass ) ) ( will ( generate ( a ( gravity wave ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (S (NP (NNP Gravity)) (VP (VBZ Waves) (SBAR (RB Just) (IN as) (S (NP (DT an) (JJ oscillating) (JJ electric) (NN charge)) (VP (VBZ generates) (NP (DT an) (JJ electromagnetic) (NN wave))))))) (, ,) (NP (NNP General) (NNP Relativity)) (VP (VBZ predicts) (SBAR (IN that) (S (NP (DT an) (VBG oscillating) (NN mass)) (VP (MD will) (VP (VB generate) (NP (DT a) (NN gravity) (NN wave))))))) (. .)))
Gravity Waves Just as an oscillating electric charge generates an electromagnetic wave, General Relativity predicts that an oscillating mass will generate a gravity wave.
(ROOT (S (NP (JJ Electromagnetic) (NNS waves)) (VP (VBP are) (VP (VBN created) (PP (IN by) (NP (VBG oscillating) (NNS charges))))) (. .)))