Wells's The Time Machine (1895), considered by some the first work of true SF.
( ( Wells ( 's ( ( The ( Time Machine ) ) ( -LRB- ( 1895 -RRB- ) ) ) ) ) ( , ( ( ( considered ( by some ) ) ( ( the ( first work ) ) ( of ( true SF ) ) ) ) . ) ) )
(ROOT (SINV (S (NP (NNP Wells)) (VP (VBZ 's) (NP (NP (DT The) (NNP Time) (NN Machine)) (PRN (-LRB- -LRB-) (NP (CD 1895)) (-RRB- -RRB-))))) (, ,) (VP (VBD considered) (PP (IN by) (NP (DT some)))) (NP (NP (DT the) (JJ first) (NN work)) (PP (IN of) (NP (JJ true) (NNP SF)))) (. .)))
The Time Machine may the first ever piece of true SF.
( ( The ( Time Machine ) ) ( ( ( may ( ( the first ) ever ) ) ( piece ( of ( true SF ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNP Time) (NN Machine)) (VP (MD may) (ADVP (NP (DT the) (JJ first)) (RB ever)) (VP (VB piece) (PP (IN of) (NP (JJ true) (NNP SF))))) (. .)))