( Atoms ( connected ( in ( covalent bonds ) ) ) )
(ROOT (S (NP (NNS Atoms)) (VP (VBN connected) (PP (IN in) (NP (JJ covalent) (NNS bonds))))))
Atoms connected in covalent bonds
(ROOT (S (NP (DT A) (NN covalent) (NN network)) (ADVP (RB solid)) (VP (VBZ is) (NP (NP (DT a) (NN compound)) (SBAR (WHPP (IN in) (WHNP (WDT which))) (S (NP (NP (DT all)) (PP (IN of) (NP (DT the) (NNS atoms)))) (VP (VBP are) (VP (VBN connected) (PP (TO to) (NP (CD one) (DT another))) (PP (IN by) (NP (JJ covalent) (NNS bonds))))))))) (. .)))