( There ( ( are ( ( ( 7 periods ) and ) ( ( 18 groups ) ( in ( the table ) ) ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBP are) (NP (NP (CD 7) (NNS periods)) (CC and) (NP (NP (CD 18) (NNS groups)) (PP (IN in) (NP (DT the) (NN table)))))) (. .)))
There are 7 periods and 18 groups in the 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)))) (. .)))