Cybernetics had always been Derry's passion.
( Cybernetics ( ( ( had always ) ( been ( ( Derry 's ) passion ) ) ) . ) )
(ROOT (S (NP (NNS Cybernetics)) (VP (VBD had) (ADVP (RB always)) (VP (VBN been) (NP (NP (NNP Derry) (POS 's)) (NN passion)))) (. .)))
Derry's passion for cybernetics was once strong, but now has faded.
( ( ( ( Derry 's ) passion ) ( for cybernetics ) ) ( ( ( ( ( was ( once strong ) ) , ) but ) ( now ( has faded ) ) ) . ) )
(ROOT (S (NP (NP (NP (NNP Derry) (POS 's)) (NN passion)) (PP (IN for) (NP (NNS cybernetics)))) (VP (VP (VBD was) (ADJP (RB once) (JJ strong))) (, ,) (CC but) (VP (ADVP (RB now)) (VBZ has) (VP (VBN faded)))) (. .)))