( ( Beryllium ( -LRB- ( Be -RRB- ) ) ) ( ( is ( ( the ( chemical element ) ) ( with ( ( ( atomic ( number 4 ) ) , ) ( occurring ( in ( ( the form ) ( of 9Be ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNP Beryllium)) (PRN (-LRB- -LRB-) (NP (NNP Be)) (-RRB- -RRB-))) (VP (VBZ is) (NP (NP (DT the) (JJ chemical) (NN element)) (PP (IN with) (NP (NP (JJ atomic) (NN number) (CD 4)) (, ,) (VP (VBG occurring) (PP (IN in) (NP (NP (DT the) (NN form)) (PP (IN of) (NP (CD 9Be)))))))))) (. .)))
Beryllium (Be) is the chemical element with atomic number 4, occurring in the form of 9Be.
(ROOT (S (NP (NP (DT The) (JJ low) (JJ atomic) (NN number)) (PP (IN of) (NP (NN beryllium)))) (VP (VBZ allows) (S (NP (PRP it)) (VP (TO to) (VP (VB absorb) (NP (NNPS x-rays)))))) (. .)))