(S (S (PP-SBJ (BASENP (NNP ＷＨＯ)) (IN は)) (COMMA 、) (VP (SBAR (S (PP-SBJ (NP (PP (BASENP (NN 感染) (NN 者)) (IN の)) (BASENP (PRE 大) (NN 多数))) (IN が)) (VP (NP (PP (BASENP (NN ３０) (NN 歳)) (IN から)) (BASENP (NN ５０) (NN 歳))) (MD だ))) (INQT と)) (VB 言う))) (PERIOD 。))
WHO は 、 感染 者 の 大 多数 が ３０ 歳 から ５０ 歳 だ と 言う 。
Of those infected , the WHO says the majority are aged from 30 to 50 years old .