[{"from": "human", "value": "Generate a molecule based on this description. The molecule is a chemical compound of lanthanum and bromine. Cerium activated lanthanum bromide is used in scintillation detector. Bromine is a halogen element with the symbol Br and atomic number 35. Diatomic bromine does not occur naturally, but bromine salts can be found in crustal rock. (L625, L655)"}, {"from": "gpt", "value": "[Br][La][Branch1][C][Br][Br]"}]