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 knew nothing of cybernetics.
( Derry ( ( knew ( nothing ( of cybernetics ) ) ) . ) )
(ROOT (S (NP (NNP Derry)) (VP (VBD knew) (NP (NP (NN nothing)) (PP (IN of) (NP (NNS cybernetics))))) (. .)))