preferred_name: Facial expressions (e.g., grimaces, winces, wrinkled forehead, furrowed brow, clenched teeth or jaw)
preferred_name_lc: facial expressions (e.g., grimaces, winces, wrinkled forehead, furrowed brow, clenched teeth or jaw)
label: Facial expressions (e.g., grimaces, winces, wrinkled forehead, furrowed brow, clenched teeth or jaw)
label_lc: facial expressions (e.g., grimaces, winces, wrinkled forehead, furrowed brow, clenched teeth or jaw)