19331
The large shear moduli , large Young ' s moduli , low Poisson ratios , and low bulk and shear modulus ratios of CrB4 <F8FF> PSC and CrB4 <F8FF> PSD indicate that they are potential hard materials .
 Chemical: CrB4; Chemical: CrB4
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: CrB4; Chemical: CrB4