preferred_name: Claimed Response (i.e., Partial Response, Complete Response, Stable) or Reported Response Cannot Be Verified
preferred_name_lc: claimed response (i.e., partial response, complete response, stable) or reported response cannot be verified
label: Claimed Response (i.e., Partial Response, Complete Response, Stable) or Reported Response Cannot Be Verified
label_lc: claimed response (i.e., partial response, complete response, stable) or reported response cannot be verified