15326
Antagonistic effects of cytotoxicity were mainly found between Cr ( VI ) and Ni ( II ) , and synergistic effects of DNA damage and oxidative stress were partially found between these two compounds .
 Chemical: Cr ( VI ); Chemical: Ni ( II )
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: Cr ( VI ); Chemical: Ni ( II )