( Thus ( , ( ( in ( strong ( and ( electromagnetic interactions ) ) ) ) ( , ( ( ( the ( general laws ) ) ( of ( quark ( and ( lepton ( number conservation ) ) ) ) ) ) ( ( can ( be ( subdivided ( into ( ( ( ( ( separate ( flavor ( conservation laws ) ) ) ( -LRB- ( ( number ( of ( particles ( minus ( number ( of antiparticles ) ) ) ) ) ) -RRB- ) ) ) ( for ( each ( of ( the ( six ( quark types ) ) ) ) ) ) ) and ) ( each ( of ( the ( six ( lepton types ) ) ) ) ) ) ) ) ) ) . ) ) ) ) ) )
(ROOT (S (ADVP (RB Thus)) (, ,) (PP (IN in) (NP (JJ strong) (CC and) (JJ electromagnetic) (NNS interactions))) (, ,) (NP (NP (DT the) (JJ general) (NNS laws)) (PP (IN of) (NP (NN quark) (CC and) (NN lepton) (NN number) (NN conservation)))) (VP (MD can) (VP (VB be) (VP (VBN subdivided) (PP (IN into) (NP (NP (NP (NP (JJ separate) (NN flavor) (NN conservation) (NNS laws)) (PRN (-LRB- -LRB-) (NP (NP (NN number)) (PP (IN of) (NP (NP (NNS particles)) (PP (CC minus) (NP (NP (NN number)) (PP (IN of) (NP (NNS antiparticles)))))))) (-RRB- -RRB-))) (PP (IN for) (NP (NP (DT each)) (PP (IN of) (NP (DT the) (CD six) (NN quark) (NNS types)))))) (CC and) (NP (NP (DT each)) (PP (IN of) (NP (DT the) (CD six) (NN lepton) (NNS types))))))))) (. .)))
Thus, in strong and electromagnetic interactions, the general laws of quark and lepton number conservation can be subdivided into separate flavor conservation laws (number of particles minus number of antiparticles ) for each of the six quark types and each of the six lepton types.
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (CD six) (NNS types)) (PP (IN of) (NP (NNS leptons))))) (. .)))