( ( ( ( CO2 lasers ) and ) ( YAG 's ) ) ( ( produce ( ( ( ( very different ) wavelengths ) and ) ( beam shapes ) ) ) . ) )
(ROOT (S (NP (NP (CD CO2) (NNS lasers)) (CC and) (NP (NNP YAG) (POS 's))) (VP (VBP produce) (NP (NP (ADJP (RB very) (JJ different)) (NNS wavelengths)) (CC and) (NP (NN beam) (NNS shapes)))) (. .)))
CO2 lasers and YAG's produce very different wavelengths and beam shapes.
(ROOT (S (NP (PRP You)) (VP (VBP call) (NP (NP (DT a) (NN device)) (SBAR (WHNP (WDT that)) (S (VP (VBZ produces) (NP (NP (DT a) (ADJP (RB very) (VBN focused)) (NN beam)) (PP (IN of) (NP (NP (JJ visible) (NN light)) (PP (IN of) (NP (NP (RB just) (CD one) (NN wavelength)) (CC and) (JJ color) (NP (DT a) (NN laser)))))))))))) (. .)))