( ( ( Thorium ( ( -LRB- ( IV -RRB- ) ) sulfide ) ) ( -LRB- ( ThS2 -RRB- ) ) ) ( ( is ( ( an ( inorganic ( chemical compound ) ) ) ( composed ( of ( ( one ( thorium atom ) ) ( ionically ( bonded ( to ( ( two atoms ) ( of sulfur ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (JJ Thorium) (PRN (-LRB- -LRB-) (NP (NNP IV)) (-RRB- -RRB-)) (NN sulfide)) (PRN (-LRB- -LRB-) (NP (NNP ThS2)) (-RRB- -RRB-))) (VP (VBZ is) (NP (NP (DT an) (JJ inorganic) (NN chemical) (NN compound)) (VP (VBN composed) (PP (IN of) (NP (NP (CD one) (NN thorium) (NN atom)) (VP (ADVP (RB ionically)) (VBN bonded) (PP (TO to) (NP (NP (CD two) (NNS atoms)) (PP (IN of) (NP (NN sulfur))))))))))) (. .)))
Thorium(IV) sulfide (ThS2) is an inorganic chemical compound composed of one thorium atom ionically bonded to two atoms of sulfur.
(ROOT (S (NP (NP (DT The) (NNS atoms)) (PP (IN of) (NP (DT a) (NN compound)))) (VP (VBP are) (VP (VBN held) (ADVP (RB together)) (PP (IN by) (NP (NN chemical) (NNS bonds))))) (. .)))