(S (S (BASENP (NNP Scotland) (NNP Yard)) (VP (VBP have) (VP (VBN announced) (SBAR (SBAR (IN that) (S (NP (BASENP (DT a) (NN number)) (PP (IN of) (BASENP (NNS arrests)))) (VP (VBP have) (VP (VBN been) (VP (VBN made)))))) (CONJP (COMMA ,) (CC and)) (SBAR (IN that) (S (NP (BASENP (NN three)) (PP (IN of) (BASENP (DT the) (VBN suspected) (NNP July) (NN 21) (NNS bombers)))) (VP (VP (VBP are) (ADVP (RB now))) (PP (IN in) (BASENP (NN custody)))))))))) (PERIOD .))