(S (S (PP-SBJ (NP (PP (BASENP (NN 右) (NN 後ろ) (NN 脚)) (IN の)) (NN 蹄)) (IN は)) (COMMA 、) (VP (BASENP (NN 既に)) (VP (PP (NP (PP (BASENP (NN 週)) (IN の)) (NN 始め)) (IN に)) (COMMA 、) (VP (PP (NP (PP (BASENP (JJ 辛い) (NN 膿瘍)) (IN の)) (NN 広がり)) (IN で)) (VP (VP (VP (NN 悪化) (VBV し)) (INTE て)) (VP (VBV い) (VP (MD た)))))))) (PERIOD 。))
右 後ろ 脚 の 蹄 は 、 既に 週 の 始め に 、 辛い 膿瘍 の 広がり で 悪化 し て い た 。
The right rear hoof was already deteriorating , having developed a painful abscess earlier in the week .