Individual #Quaternary_period__Quaternary__Age_of_Man  last 2 million years
  instance of:  geological_period
  part of:  Cenozoic_era
  part:  Holocene_epoch__Holocene__Recent_epoch  approximately the last 10,000 years
  part:  Pleistocene_epoch__Pleistocene__Glacial_epoch  from 11 thousand to 2 millions years ago; extensive glaciation of N hemisphere; time of human evolution

No statement uses or specializes Quaternary_period; click here to add one.