Except for its origin, in the British Interplanetary Society Journal, space warp has been restricted to fictional use.
( ( Except ( for ( its origin ) ) ) ( , ( ( in ( the ( British ( Interplanetary ( Society Journal ) ) ) ) ) ( , ( ( space warp ) ( ( has ( been ( restricted ( to ( fictional use ) ) ) ) ) . ) ) ) ) ) )
(ROOT (S (PP (IN Except) (PP (IN for) (NP (PRP$ its) (NN origin)))) (, ,) (PP (IN in) (NP (DT the) (NNP British) (NNP Interplanetary) (NNP Society) (NNP Journal))) (, ,) (NP (NN space) (NN warp)) (VP (VBZ has) (VP (VBN been) (VP (VBN restricted) (PP (TO to) (NP (JJ fictional) (NN use)))))) (. .)))
There was a lot of secret use of the space warp. 
( There ( ( was ( ( a lot ) ( of ( ( secret use ) ( of ( the ( space warp ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBD was) (NP (NP (DT a) (NN lot)) (PP (IN of) (NP (NP (JJ secret) (NN use)) (PP (IN of) (NP (DT the) (NN space) (NN warp))))))) (. .)))