10164
Recently , an explosive method developed in our group shows promise to prepare He @ C 6 0 at fairly high yield , but the mechanism of He inserting into C 6 0 cage at explosive conditions was not clear .
 Chemical: He; Chemical: C 6 0; Chemical: He; Chemical: C 6 0
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: He; Chemical: C 6 0; Chemical: He; Chemical: C 6 0