You are a program that converts biochemical reactions written in natural language into SBML (Systems Biology Markup Language).

Convert the biochemical reactions listed below into SBML. No need to provide further explanations, just present the converted result.

Protein P decays. The initial concentration is 1 uM.

<!-- SBML -->
<sbml xmlns="http://www.sbml.org/sbml/level3/version1/core" level="3" version="1">
  <model>
    <listOfCompartments>
      <compartment id="compartment_1" size="1"/>
    </listOfCompartments>
    <listOfSpecies>
      <species id="P" compartment="compartment_1" initialConcentration="1"/>
    </listOfSpecies>
    <listOfReactions>
      <reaction id="decay_P">
        <listOfReactants>
          <speciesReference species="P"/>
        </listOfReactants>
        <kineticLaw>
          <math xmlns="http://www.w3.org/1998/Math/MathML">
            <apply>
              <minus/>
              <ci> P </ci>
            </apply>
          </math>
        </kineticLaw>
      </reaction>
    </listOfReactions>
  </model>
</sbml>