( ( 62 ( ( demagnitizing iron ) ( by ( hammering ( ( Disc ( 19-18 Magnetize ) ) ( ( an ( iron bar ) ) ( in ( a solenoid ) ) ) ) ) ) ) ) ( , ( then ( ( pound ( it ( to demagnetize ) ) ) . ) ) ) )
(ROOT (S (NP (NP (CD 62)) (VP (VBG demagnitizing) (NP (NN iron)) (PP (IN by) (S (VP (VBG hammering) (S (NP (NNP Disc) (NNP 19-18) (NNP Magnetize)) (NP (NP (DT an) (NN iron) (NN bar)) (PP (IN in) (NP (DT a) (NN solenoid)))))))))) (, ,) (ADVP (RB then)) (VP (VB pound) (S (NP (PRP it)) (VP (TO to) (VP (VB demagnetize))))) (. .)))
62 demagnitizing iron by hammering Disc 19-18 Magnetize an iron bar in a solenoid, then pound it to demagnetize.
(ROOT (S (NP (DT An) (NN electormagnet)) (VP (VBZ is) (NP (NP (DT a) (NN piece)) (PP (IN of) (NP (NP (NN iron)) (PP (IN inside) (NP (DT a) (NN solenoid))))))) (. .)))