20710
The structures and energies of the electronic ground states of the FeS ( 0 / - ) , FeS2 ( 0 / - ) , Fe2 S2 ( 0 / - ) , Fe3 S4 ( 0 / - ) , and Fe4 S4 ( 0 / - ) neutral and anionic clusters have been computed systematically with nine computational methods in combination with seven basis sets .
 Chemical: FeS; Chemical: FeS2; Chemical: Fe2 S2; Chemical: Fe3 S4; Chemical: Fe4 S4
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: FeS; Chemical: FeS2; Chemical: Fe2 S2; Chemical: Fe3 S4; Chemical: Fe4 S4