( ( ( The ( sub-atomic ( particle constituents ) ) ) ( of ( the nucleus ) ) ) ( ( -LRB- ( ( all ( undiscovered ( until ( ( the 1930 ) ( ( ( 's , ) and ) ( therefore ( ( unknown ( to Einstein ) ) ( as ( ( ( of 1905 ) or ) 1916 ) ) ) ) ) ) ) ) ) -RRB- ) ) ( ( are ( released ( in ( ( ( ( ( nuclear ( fusion ( and ( fission reactions ) ) ) ) ( as high-velocity ) ) and ) therefore ) ( ( high-energy particles ) ( of ( various kinds ) ) ) ) ) ) ) . ) ) )
(ROOT (S (NP (NP (DT The) (JJ sub-atomic) (NN particle) (NNS constituents)) (PP (IN of) (NP (DT the) (NN nucleus)))) (PRN (-LRB- -LRB-) (S (NP (DT all)) (VP (VBD undiscovered) (SBAR (IN until) (S (NP (DT the) (CD 1930)) (VP (VP (VBZ 's)) (, ,) (CC and) (VP (ADVP (RB therefore)) (ADJP (JJ unknown) (PP (TO to) (NP (NNP Einstein)))) (PP (IN as) (NP (QP (IN of) (CD 1905) (CC or) (CD 1916)))))))))) (-RRB- -RRB-)) (VP (VBP are) (VP (VBN released) (PP (IN in) (NP (NP (NP (JJ nuclear) (NN fusion) (CC and) (NN fission) (NNS reactions)) (PP (IN as) (NP (NN high-velocity)))) (CC and) (ADVP (RB therefore)) (NP (NP (JJ high-energy) (NNS particles)) (PP (IN of) (NP (JJ various) (NNS kinds)))))))) (. .)))
The sub-atomic particle constituents of the nucleus (all undiscovered until the 1930's, and therefore unknown to Einstein as of 1905 or 1916) are released in nuclear fusion and fission reactions as high-velocity and therefore high-energy particles of various kinds.
(ROOT (S (NP (JJ Nuclear) (NN energy)) (VP (VBZ is) (VP (VBN released) (SBAR (WHADVP (WRB when)) (S (NP (NP (DT the) (NN nucleus)) (PP (IN of) (NP (DT an) (NN atom)))) (VP (VBZ is) (VP (VBN split))))))) (. .)))