12303
Nanocomposites made from Na - montmorillonite and metallo - supramolecular polyelectrolytes ( MEPE ) based on nickel and ditopic bis - terpyridine ligands are prepared by an aqueous synthesis .
 Chemical: Na; Chemical: montmorillonite; Chemical: nickel; Chemical: bis - terpyridine
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: Na; Chemical: montmorillonite; Chemical: nickel; Chemical: bis - terpyridine