14877
A nanoparticle synthetic strategy for the preparation of a new metastable Cu ( I ) - niobate is described , and that involves multipored Li 3 NbO 4 nanoparticles as a precursor .
 Chemical: Cu ( I ); Chemical: niobate; Chemical: Li 3 NbO 4
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: Cu ( I ); Chemical: niobate; Chemical: Li 3 NbO 4