26234
Of these 25 , a single protein , hydroxysteroid dehydrogenase like 2 , showed decreased expression in both males and females following arsenic exposure .
 Chemical: hydroxysteroid; Chemical: arsenic
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: hydroxysteroid, arsenic 
Answer:
 Chemical: hydroxysteroid; Chemical: arsenic