8182
The results indicate the important effect of a ligand size on the adsorption of NO ( 2 ) on Zr - MOF materials .
 Chemical: NO ( 2 ); Chemical: Zr
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: NO ( 2 ); Chemical: Zr