Built in a.d. 715 to help measure the peak and trough of the Nile flood.
( ( ( ( Built ( in a.d. ) ) ( 715 ( to ( help measure ) ) ) ) ( ( the ( ( peak and ) trough ) ) ( of ( the ( Nile flood ) ) ) ) ) . )
(ROOT (SINV (VP (VBN Built) (PP (IN in) (NP (NN a.d.)))) (VP (VBD 715) (S (VP (TO to) (VP (VB help) (NP (NN measure)))))) (NP (NP (DT the) (NN peak) (CC and) (NN trough)) (PP (IN of) (NP (DT the) (NNP Nile) (NN flood)))) (. .)))
It was built to deal with the Nile flood.
( It ( ( was ( built ( to ( deal ( with ( the ( Nile flood ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBD was) (VP (VBN built) (S (VP (TO to) (VP (VB deal) (PP (IN with) (NP (DT the) (NNP Nile) (NN flood)))))))) (. .)))