PROP: name=PRO present(HT1, HT2)
NTER: name=all present(HT1, HT2, HT3)
CTER: name=all present(OXT)
CTN:  name=all present(NT, HT1, HT2)
CYNH: name=CYS present(1SG) absent(2SG)
DISU: name=CYS present(1SG, 2SG)
HISE: name=HIS present(ND1, CE1, CD2, NE2, HE2) absent(HD1)
HISD: name=HIS present(ND1, CE1, CD2, NE2, HD1) absent(HE2)
