def get_mts(virt_eths):
    """
    Parse the machine type/model/serial from the IVM output.

    :param virt_eths: A dictionary with adapter data from IVM
    :returns: A string in the form "type.model.serial"
    """
    for key in virt_eths.keys():
        if 'Virtual I/O Ethernet Adapter (l-lan)' in virt_eths[key][0]:
            return virt_eths[key][1].split('-')[0]
    return None