def get_widget(self) -> AltairChart:
        """
        Return the scientific chart.

        Returns:
            The scientific chart.

        """
        data = pd.DataFrame({"a": list("CCCDDDEEE"), "b": [2, 7, 4, 1, 2, 6, 8, 4, 7]})
        spec = alt.Chart(data).mark_point().encode(x="a", y="b")
        chart = AltairChart(title=self.title)
        chart.set_data(spec)
        return chart

class SciChart(AltairChart):
    """
    Scientific chart with Altair.
    """

    #: The title of the chart.
    title = "Scientific Proofiness"

    def load(self) -> None:
        """
        Load the chart data.

        """
        data = pd.DataFrame({"a": list("CCCDDDEEE"), "b": [2, 7, 4, 1, 2, 6, 8, 4, 10]})
        spec = alt.Chart(data).mark_point().encode(x="a", y="b")
        self.set_data(spec)