( Some ( ( ( manufacturers already ) ( design ( to ( block ( blue light ) ) ) ) ) ; ) )
(ROOT (S (NP (DT Some)) (VP (VBZ manufacturers) (ADVP (RB already)) (VP (VB design) (S (VP (TO to) (VP (VB block) (NP (JJ blue) (NN light))))))) (: ;)))
Some manufacturers already design to block 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)))))))) (. .)))