(S (S (S (S (BASENP (NNP Tartaglia)) (VP (VBD was) (VP (VBG holding) (NP (BASENP (DT a) (NN replica)) (PP (IN of) (NP (BASENP (NNP Milan) (POS 's)) (BASENP (JJ famous) (NNP Domo) (NNP Cathedral)))))))) (SBAR (IN as) (S (BASENP (PRP he)) (VP (VBD struck) (BASENP (DT the) (NN premier)))))) (COLON ;) (S (S (NP (BASENP (DT the) (NN composition)) (PP (IN of) (BASENP (DT the) (NN replica)))) (VP (VBZ is) (ADJP (JJ unknown)))) (CONJP (COMMA ,) (CC but)) (S (BASENP (NNS eyewitnesses)) (VP (VBP suggest) (SBAR (S (BASENP (PRP it)) (VP (MD may) (VP (VB have) (VP (VBN been) (VP (VBN made) (PP (IN from) (NP (NP (BASENP (NN marble)) (COMMA ,) (BASENP (NN iron))) (CC or) (BASENP (DT another) (JJ heavy) (NN material)))))))))))))) (PERIOD .))