Task: Answer the following question about the molecule with SMILES O=S(=O)([O-])[O-].[Ba+2].
Question: What is the first recorded year of approval for this drug?
Answer: 2016
Task: Answer the following question about the molecule with {SMILES__description} {SMILES#}.
{#Description|Question|Request!}: {quest#}
{#Result|Answer|Completion!}: {answ#}
O=S(=O)([O-])[O-].[Ba+2]
O=S(=O)([O-])[O-].[Ba+2]
barium(2+);sulfate
What is the first recorded year of approval for this drug?