Hughes has accomplished this in part by the unusual technique of double ghosting.
( Hughes ( ( has ( ( accomplished ( this ( in part ) ) ) ( by ( ( the ( unusual technique ) ) ( of ( double ghosting ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Hughes)) (VP (VBZ has) (VP (VBN accomplished) (NP (NP (DT this)) (PP (IN in) (NP (NN part)))) (PP (IN by) (NP (NP (DT the) (JJ unusual) (NN technique)) (PP (IN of) (NP (JJ double) (NN ghosting))))))) (. .)))
He was able to double ghost.
( He ( ( was ( able ( to ( double ghost ) ) ) ) . ) )
(ROOT (S (NP (PRP He)) (VP (VBD was) (ADJP (JJ able) (S (VP (TO to) (VP (VB double) (NP (NN ghost))))))) (. .)))