( He ( then ( ( ( gave Archimedes ) ( ( the challenge ) ( of ( launching ( ( ( the Syracusia ) , ) ( ( an ( enormous ship ) ) ( weighing ( ( ( 4 200 ) tons ) ( that ( had ( been ( built ( as ( ( ( ( ( ( a gift ) ( for Ptolemy ) ) , ) ( King ( of Egypt ) ) ) and ) ( which ( ( was ( so heavy ) ) ( that ( ( all ( previous ( launch attempts ) ) ) ( had failed ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (NP (PRP He)) (ADVP (RB then)) (VP (VBD gave) (NP (NNP Archimedes)) (NP (NP (DT the) (NN challenge)) (PP (IN of) (S (VP (VBG launching) (NP (NP (DT the) (NNP Syracusia)) (, ,) (NP (NP (DT an) (JJ enormous) (NN ship)) (VP (VBG weighing) (NP (NP (QP (CD 4) (CD 200)) (NNS tons)) (SBAR (WHNP (WDT that)) (S (VP (VBD had) (VP (VBN been) (VP (VBN built) (PP (IN as) (NP (NP (NP (DT a) (NN gift)) (PP (IN for) (NP (NNP Ptolemy)))) (, ,) (NP (NP (NNP King)) (PP (IN of) (NP (NNP Egypt)))) (CC and) (SBAR (WHNP (WDT which)) (S (VP (VBD was) (ADJP (RB so) (JJ heavy)) (SBAR (IN that) (S (NP (DT all) (JJ previous) (NN launch) (NNS attempts)) (VP (VBD had) (VP (VBN failed)))))))))))))))))))))))) (. .)))
He then gave Archimedes the challenge of launching the Syracusia, an enormous ship weighing 4 200 tons that had been built as a gift for Ptolemy, King of Egypt and which was so heavy that all previous launch attempts had failed.
(ROOT (S (NP (NP (NNP Archimedes) (POS ')) (NN law)) (VP (VBZ explains) (SBAR (WHADVP (WRB why)) (S (NP (NP (DT a) (NN ship)) (VP (VBG weighing) (NP (NP (NNS thousands)) (PP (IN of) (NP (JJ metric) (NNS tons)))))) (VP (VBZ floats) (PP (IN on) (NP (NN water))))))) (. .)))