sentence2_structure: An amine<>is<>an organic compound that can be considered to be a derivative of ammonia$$$an organic compound<>to be<>a derivative of ammonia
sentence1: Bacteria can be used to degrade toxic compounds, such as heavy metals, organic compounds, phosphorus, ammonia or other pollutants.
sentence2: An amine is an organic compound that can be considered to be a derivative of ammonia.
question: An amine is an organic compound that can be considered to be a derivative of what?