( ( ( ( ( The ( Standard Model ) ) , ) ( ( a ( classification table ) ) ( for ( ( physical matter ) ( comparable ( to ( ( the ( Periodic Table ) ) ( of ( chemical elements ) ) ) ) ) ) ) ) ) , ) ( ( includes ( ( ( ( six types ) ( of quarks ) ) and ) ( ( six types ) ( of leptons ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NNP Standard) (NNP Model)) (, ,) (NP (NP (DT a) (NN classification) (NN table)) (PP (IN for) (NP (NP (JJ physical) (NN matter)) (ADJP (JJ comparable) (PP (TO to) (NP (NP (DT the) (NNP Periodic) (NNP Table)) (PP (IN of) (NP (NN chemical) (NNS elements))))))))) (, ,)) (VP (VBZ includes) (NP (NP (NP (CD six) (NNS types)) (PP (IN of) (NP (NNS quarks)))) (CC and) (NP (NP (CD six) (NNS types)) (PP (IN of) (NP (NNS leptons)))))) (. .)))
The Standard Model, a classification table for physical matter comparable to the Periodic Table of chemical elements,  includes six types of quarks and six types of leptons.
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (CD six) (NNS types)) (PP (IN of) (NP (NNS leptons))))) (. .)))