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There is growing evidence that aminobisphosphonates like ibandronate show anticancer activity by an unknown mechanism .
 Chemical: aminobisphosphonates; Chemical: ibandronate
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: aminobisphosphonates; Chemical: ibandronate