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Both sulfones and bisulfones were evaluated for their antimicrobial activities against Aspergillus niger and Candida albicans ( yeast ) , Bacillus subtilis and Staphylococcus aureus ( Gram ( + ) bacteria ) and Pseudomonas aeruginosa and Salmonella typhimurium ( Gram ( - ) bacteria ) strains .
 Chemical: sulfones; Chemical: bisulfones
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: sulfones; Chemical: bisulfones