16023
We experimentally studied the thermoelectric power factor of hole gas in individual Ge - Si core - shell nanowires with Ge core diameters ranging from 11 to 25 nm .
 Chemical: Ge; Chemical: Si; Chemical: Ge
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: Ge, Si, Ge 
Answer:
 Chemical: Ge; Chemical: Si; Chemical: Ge