( It ( ( is ( named ( after ( ( ( Enrico ( Fermi ( and ( Paul Dirac ) ) ) ) , ) ( who ( each ( ( ( ( discovered it ) independently ) , ) ( although ( ( Enrico Fermi ) ( ( defined ( the statistics ) ) ( earlier ( than ( Paul Dirac ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ is) (VP (VBN named) (PP (IN after) (NP (NP (NNP Enrico) (NNP Fermi) (CC and) (NNP Paul) (NNP Dirac)) (, ,) (SBAR (WHNP (WP who)) (S (DT each) (VP (VBD discovered) (NP (PRP it)) (ADVP (RB independently)) (, ,) (SBAR (IN although) (S (NP (NNP Enrico) (NNP Fermi)) (VP (VBD defined) (NP (DT the) (NNS statistics)) (ADVP (RBR earlier) (PP (IN than) (NP (NNP Paul) (NNP Dirac)))))))))))))) (. .)))
It is named after Enrico Fermi and Paul Dirac, who each discovered it independently, although Enrico Fermi defined the statistics earlier than Paul Dirac.
(ROOT (S (NP (NNP Enrico) (NNS fermi)) (VP (VBZ is) (NP (NP (DT the) (NN name)) (PP (IN of) (NP (NP (DT the) (NN scientist)) (SBAR (WHNP (WP who)) (S (VP (VBD named) (NP (NNS neutrinos))))))))) (. .)))