<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def describe(self, element):
 # pragma: no cover """Return tasks or task_runs Panda describe."""

        if (element == 'tasks'):
            return self.tasks_df.describe()
        elif (element == 'task_runs'):
            return self.task_runs_df.describe()
        else:
            return "ERROR: %s not found" % element