9321
Probing the structural , electronic and magnetic properties of multicenter Fe 2 S 2 0 / - , Fe 3 S 4 0 / - and Fe 4 S 4 0 / - clusters .
 Chemical: Fe 2 S 2; Chemical: Fe 3 S 4; Chemical: Fe 4 S 4
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: Fe 2 S 2; Chemical: Fe 3 S 4; Chemical: Fe 4 S 4