( ( ( This interconnection ) ( of ( transverse ( electromagnetic waves ) ) ) ) ( ( is ( called ( a ( wave train ) ) ) ) . ) )
(ROOT (S (NP (NP (DT This) (NN interconnection)) (PP (IN of) (NP (JJ transverse) (JJ electromagnetic) (NNS waves)))) (VP (VBZ is) (VP (VBN called) (NP (DT a) (NN wave) (NN train)))) (. .)))
This interconnection of transverse electromagnetic waves is called a wave train.
(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))))) (. .)))