18722
The difficulties associated with the decision whether testicular toxicity is primary or secondary to hypoxia are exemplified by the results of inhalation studies with nickel subsulphide and gallium arsenide ( GaAs ) .
 Chemical: nickel subsulphide; Chemical: gallium arsenide; Chemical: GaAs
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: nickel subsulphide; Chemical: gallium arsenide; Chemical: GaAs