preferred_name: Absence of 1 or more MTDs 4 to 7 at principal piece
preferred_name_lc: absence of 1 or more mtds 4 to 7 at principal piece
label: Absence of 1 or more MTDs 4 to 7 at principal piece
label_lc: absence of 1 or more mtds 4 to 7 at principal piece