/projects/matbench_phonons">interactive</a></td>
<td>16</td>
</tr>
<tr>
<td><code>matbench_expt_gap</code></td>
<td>regression/composition</td>
<td><code>gap expt</code> (eV)</td>
<td>4,604</td>
<td>1.1432</td>
<td><a href="https://ml.materialsproject.org/projects/matbench_expt_gap.json.gz">download</a>, <a href="https://ml.materialsproject.org/projects/matbench_expt_gap">interactive</a></td>
<td>12</td>
</tr>
<tr>
<td><code>matbench_dielectric</code></td>
<td>regression/structure</td>
<td><code>n</code> (u