24684
The inner core of all these clusters is composed mainly of Ar atoms , and Kr and Xe atoms are distributed on the surface with well mixed pattern for polytetrahedral and segregate pattern for six - fold pancake configurations .
 Chemical: Ar; Chemical: Kr; Chemical: Xe
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: Ar; Chemical: Kr; Chemical: Xe