import click

@click.group()
def prediction_cli():
    """Commands for running predictions."""
    pass

@prediction_cli.command()
@click.argument('model_name')
@click.argument('dataset_name')
def run(model_name, dataset_name):
    """Run predictions using the specified model on the given dataset."""
    # Example placeholder logic for running predictions
    click.echo(f"Running predictions on '{dataset_name}' using model '{model_name}'.")

@prediction_cli.command()
def list():
    """List all previous predictions."""
    # Example placeholder logic for listing previous predictions
    click.echo("Predictions: prediction1, prediction2")
