( Aluminum ( ( is ( ( a ( group ( IIIa element ) ) ) ( under ( boron ( in ( ( the ( periodic table ) ) ( of ( the elements ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Aluminum)) (VP (VBZ is) (NP (NP (DT a) (NN group) (NNP IIIa) (NN element)) (PP (IN under) (NP (NP (NN boron)) (PP (IN in) (NP (NP (DT the) (JJ periodic) (NN table)) (PP (IN of) (NP (DT the) (NNS elements))))))))) (. .)))
Aluminum is a group IIIa element under boron in the periodic table of the elements.
(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)))) (. .)))