( ( Although ( it ( is ( in ( ( Group 3 ) ( of ( the ( Periodic Table ) ) ) ) ) ) ) ) ( , ( boron ( ( ( is not ) ( like Aluminum ) ) . ) ) ) )
(ROOT (S (SBAR (IN Although) (S (NP (PRP it)) (VP (VBZ is) (PP (IN in) (NP (NP (NNP Group) (CD 3)) (PP (IN of) (NP (DT the) (NNP Periodic) (NNP Table)))))))) (, ,) (NP (NN boron)) (VP (VBZ is) (RB not) (PP (IN like) (NP (NNP Aluminum)))) (. .)))
Although it is in Group 3 of the Periodic Table, boron is not like Aluminum.
(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)))) (. .)))