def general_acquisition_info(metadata):
    """
    General sentence on data acquisition. Should be first sentence in MRI data
    acquisition section.

    Parameters
    ----------
    metadata : :obj:`dict`
        The metadata for the dataset.

    Returns
    -------
    out_str : :obj:`str`
        Output string with scanner information.
    """
    out_str = (
        'MR data were acquired using a {tesla}-Tesla {manu} {model} MRI scanner.'
        )
    out_str = out_str.format(tesla=metadata.get('MagneticFieldStrength',
        'UNKNOWN'), manu=metadata.get('Manufacturer', 'MANUFACTURER'),
        model=metadata.get('ManufacturersModelName', 'MODEL'))
    return out_str
