preferred_name: Attains upright head position at least once but sustains for less than 15 seconds.
preferred_name_lc: attains upright head position at least once but sustains for less than 15 seconds.
label: Attains upright head position at least once but sustains for less than 15 seconds.
label_lc: attains upright head position at least once but sustains for less than 15 seconds.