preferred_name: Able to hold position for 50S - trial 2^eyes open+tandem stance+on solid surface
preferred_name_lc: able to hold position for 50s - trial 2^eyes open+tandem stance+on solid surface
label: Able to hold position for 50S - trial 2^eyes open+tandem stance+on solid surface
label_lc: able to hold position for 50s - trial 2^eyes open+tandem stance+on solid surface