preferred_name: Normal, no difficulties in walking, turning and walking tandem (up to one misstep allowed)
preferred_name_lc: normal, no difficulties in walking, turning and walking tandem (up to one misstep allowed)
label: Normal, no difficulties in walking, turning and walking tandem (up to one misstep allowed)
label_lc: normal, no difficulties in walking, turning and walking tandem (up to one misstep allowed)