1844
However , research on the effects of parabens on health is limited , and the effects of parabens on adipogenesis have not been systematically studied .
 Chemical: parabens; Chemical: parabens
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: parabens, parabens 
Answer:
 Chemical: parabens; Chemical: parabens