( ( The ( Standard Model ) ) ( ( answers ( ( ( ( ( ( many ( of ( ( the questions ) ( of ( ( the ( ( structure and ) stability ) ) ( of ( matter ( with ( ( its ( six types ) ) ( of quarks ) ) ) ) ) ) ) ) ) ) , ) ( six ( of leptons ) ) ) , ) and ) ( the ( four ( force types ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NNP Standard) (NNP Model)) (VP (VBZ answers) (NP (NP (NP (JJ many)) (PP (IN of) (NP (NP (DT the) (NNS questions)) (PP (IN of) (NP (NP (DT the) (NN structure) (CC and) (NN stability)) (PP (IN of) (NP (NP (NN matter)) (PP (IN with) (NP (NP (PRP$ its) (CD six) (NNS types)) (PP (IN of) (NP (NNS quarks)))))))))))) (, ,) (NP (NP (CD six)) (PP (IN of) (NP (NNS leptons)))) (, ,) (CC and) (NP (DT the) (CD four) (NN force) (NNS types)))) (. .)))
The Standard Model answers many of the questions of the structure and stability of matter with its six types of quarks, six of leptons, and the four force types.
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (CD six) (NNS types)) (PP (IN of) (NP (NNS leptons))))) (. .)))