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It has been hypothesized that oils containing high levels of omega - 3 polyunsaturated fatty acids , such as canola and fish oil , could counteract some of the adverse effects induced by phthalates .
 Chemical: omega - 3 polyunsaturated fatty acids; Chemical: phthalates
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: omega - 3 polyunsaturated fatty acids; Chemical: phthalates