(S (S (NP (PP (NP (S-REL (PP (NP (PP (BASENP (NN １２) (NN 週間) (NN 以内)) (IN の)) (NN 治療)) (IN で)) (S-NSBJ (VP (PP-OBJ (NP (PP (BASENP (NN 鬱) (NN 症状)) (IN の)) (NN 軽減)) (IN を)) (VP (VP (NN 経験) (VBV し)) (VP (MD た)))))) (NN 人)) (IN の)) (NN うち)) (COMMA 、) (S (PP-SBJ (BASENP (NN １０) (NN パーセント)) (IN は)) (VP (PP-OBJ (BASENP (NN 薬物) (NN 乱用) (NN 問題)) (IN を)) (VP (VB 抱える) (VP (MDP (NN よう) (IN に) (VBV なっ)) (VP (MD た))))))) (PERIOD 。))
12 週間 以内 の 治療 で 鬱 症状 の 軽減 を 経験 し た 人 の うち 、 10 パーセント は 薬物 乱用 問題 を 抱える よう に なっ た 。
Of those who had experienced a reduction in depressive symptoms within twelve weeks of treatment , ten percent went on to have drug abuse problems .