( ( ( Relate discoveries ) ( to ( ( the concepts ) ( of ( ( ( ( ( particles , ) density ) , ) and ) matter ) ) ) ) ) . )
(ROOT (S (VP (VB Relate) (NP (NNS discoveries)) (PP (TO to) (NP (NP (DT the) (NNS concepts)) (PP (IN of) (NP (NP (NNS particles)) (, ,) (NP (NN density)) (, ,) (CC and) (NP (NN matter))))))) (. .)))
Relate discoveries to the concepts of particles, density, and matter.
(ROOT (S (NP (NP (NNP Density)) (PP (IN of) (NP (NN matter)))) (VP (VBZ reflects) (SBAR (WHADVP (WRB how) (RB closely)) (S (VP (VBD packed) (SBAR (S (NP (NP (DT the) (NNS particles)) (PP (IN of) (NP (NN matter)))) (VP (VBP are)))))))) (. .)))