87172
In the Pleistocene period ( 1.8 – 0.01 million years ago ) this was a collection area for ice that fell down over steps of rock from surrounding peaks , dragging with it heterogeneous material .
 location: Pleistocene
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Pleistocene 
Answer:
 location: Pleistocene