( Vectors ( ( have ( ( ( ( both ( a magnitude ) ) ( -LRB- ( ( or size ) -RRB- ) ) ) and ) ( a direction ) ) ) . ) )
(ROOT (S (NP (NNS Vectors)) (VP (VBP have) (NP (NP (PDT both) (DT a) (NN magnitude)) (PRN (-LRB- -LRB-) (PP (CC or) (NP (NN size))) (-RRB- -RRB-)) (CC and) (NP (DT a) (NN direction)))) (. .)))
Vectors have both a  magnitude (or size) and a direction.
(ROOT (S (NP (NNP Vector)) (VP (VBZ is) (NP (NP (DT a) (NN measure)) (SBAR (WHNP (WDT that)) (S (VP (VBZ has) (NP (DT both) (NN size) (CC and) (NN direction))))))) (. .)))