( ( ( ( Electromagnetic Fields ) and ) ( Waves ( -LRB- Cat ) ) ) . )
(ROOT (NP (NP (NP (NNP Electromagnetic) (NNP Fields)) (CC and) (NP (NNP Waves) (-LRB- -LRB-) (NNP Cat))) (. .)))
Electromagnetic Fields and Waves (Cat.
(ROOT (S (SBAR (IN Because) (S (NP (NP (DT the) (NNS fields)) (SBAR (WHNP (WDT that)) (S (VP (VBP make) (PRT (RP up)) (NP (DT an) (JJ electromagnetic) (NN wave)))))) (VP (VBP are) (PP (IN at) (NP (NP (JJ right) (NNS angles)) (PP (PP (TO to) (NP (DT each) (JJ other))) (CC and) (PP (TO to) (NP (DT the) (NN direction)))))) (SBAR (IN that) (S (NP (DT the) (NN wave)) (VP (VBZ travels))))))) (, ,) (NP (DT an) (JJ electromagnetic) (NN wave)) (VP (VBZ is) (VP (VBN considered) (S (NP (DT a) (-LRB- -LRB-) (NN n) (-RRB- -RRB-) (NN transverse) (NN wave))))) (. .)))