( ( In fact ) ( , ( ( all ( electromagnetic waves ) ) ( ( are ( produced ( by ( oscillating charges ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (NN fact))) (, ,) (NP (DT all) (JJ electromagnetic) (NNS waves)) (VP (VBP are) (VP (VBN produced) (PP (IN by) (NP (VBG oscillating) (NNS charges))))) (. .)))
In fact, all electromagnetic waves are produced by oscillating charges.
(ROOT (S (NP (JJ Electromagnetic) (NNS waves)) (VP (VBP are) (VP (VBN created) (PP (IN by) (NP (VBG oscillating) (NNS charges))))) (. .)))