( ( ( An object ) ( illuminated ( by ( blue light ) ) ) ) ( ( ( ( ( can , ) ( of course ) ) , ) ( reflect ( only ( blue light ) ) ) ) . ) )
(ROOT (S (NP (NP (DT An) (NN object)) (VP (VBN illuminated) (PP (IN by) (NP (JJ blue) (NN light))))) (VP (MD can) (, ,) (PP (IN of) (NP (NN course))) (, ,) (VP (VB reflect) (NP (RB only) (JJ blue) (NN light)))) (. .)))
An object illuminated by blue light can, of course, reflect only blue light.
(ROOT (S (NP (DT A) (JJ blue) (NN block)) (VP (VBZ appears) (ADJP (JJ blue) (PP (IN in) (NP (DT the) (NN sunlight)))) (SBAR (IN if) (S (NP (RB only) (JJ blue) (NN light)) (VP (VBZ is) (VP (VBN reflected) (PP (IN by) (NP (DT the) (NN block)))))))) (. .)))