(S (S (BASENP (NN One) (NN study)) (VP (VBD indicated) (SBAR (IN that) (S (S (NP (NP (QP (ADJP (ADJP (RB as) (JJ many)) (IN as)) (NN 92)) (NN %)) (PP (IN of) (NP (BASENP (JJ adolescent) (NNS girls)) (PP (IN in) (BASENP (NNP Northern) (NNP Europe)))))) (VP (MD may) (VP (VB have) (NP (BASENP (JJ deficient) (NNS levels)) (PP (IN of) (BASENP (NN Vitamin) (NN D))))))) (CC and) (S (BASENP (NN 37) (NN %)) (VP (VBP have) (BASENP (ADJP (RB severely) (JJ deficient)) (NNS levels)))))))) (PERIOD .))