( It ( ( is ( ( a member ) ( of ( ( group Va ) ( of ( the ( periodic table ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ is) (NP (NP (DT a) (NN member)) (PP (IN of) (NP (NP (NN group) (NNP Va)) (PP (IN of) (NP (DT the) (JJ periodic) (NN table))))))) (. .)))
It is a member of group Va of the periodic table .
(ROOT (S (NP (NP (NNP Group) (CD 13)) (PP (IN of) (NP (DT the) (JJ periodic) (NN table)))) (VP (VBZ is) (ADVP (RB also)) (VP (VBN called) (NP (DT the) (DT the) (NN boron) (NN group)))) (. .)))