( ( ( ( ( ( ( The head ) ( of ( the ( sperm whale ) ) ) ) ( may ( ( contain up ) ( to ( ( ( ( a ton ) ( of ( fine oil ) ) ) , ) ( known ( as ( sperm oil ) ) ) ) ) ) ) ) , ) and ) ( ( a wax ) ( called spermaceti ) ) ) . )
(ROOT (S (S (NP (NP (DT The) (NN head)) (PP (IN of) (NP (DT the) (NN sperm) (NN whale)))) (VP (MD may) (VP (VB contain) (PRT (RP up)) (PP (TO to) (NP (NP (DT a) (NN ton)) (PP (IN of) (NP (JJ fine) (NN oil))) (, ,) (VP (VBN known) (PP (IN as) (NP (NN sperm) (NN oil))))))))) (, ,) (CC and) (S (NP (DT a) (NN wax)) (VP (VBD called) (NP (NNS spermaceti)))) (. .)))
The head of the sperm whale may contain up to a ton of fine oil, known as sperm oil , and a wax called spermaceti .
(ROOT (S (NP (NP (DT The) (NN head)) (PP (IN of) (NP (DT the) (NN sperm)))) (VP (VBZ contains) (NP (DT the) (NN nucleus))) (. .)))
The head of the sperm contains the nucleus.