( ( for instance ) ( , ( ( one ( of ( ( the ( clearest ( `` ( signatures '' ) ) ) ) ( of ( the ( Higgs Boson ) ) ) ) ) ) ( ( ( is ( its decay ) ) ( into ( four muons ) ) ) . ) ) ) )
(ROOT (S (PP (IN for) (NP (NN instance))) (, ,) (NP (NP (CD one)) (PP (IN of) (NP (NP (DT the) (JJ clearest) (`` ``) (NNS signatures) ('' '')) (PP (IN of) (NP (DT the) (NNP Higgs) (NNP Boson)))))) (VP (VBZ is) (NP (PRP$ its) (NN decay)) (PP (IN into) (NP (CD four) (NNS muons)))) (. .)))
for instance, one of the clearest "signatures" of the Higgs Boson is its decay into four muons.
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (CD four) (NNS types)) (PP (IN of) (NP (NNS bosons))))) (. .)))