9177
Furthermore , pair distribution function ( PDF ) analysis suggests that the local structure of these Pb ( m ) Sb ( 2n ) Te ( m + 3n ) nanocrystals is distorted with respect to the rock - salt structure .
 Chemical: Pb ( m ) Sb ( 2n ) Te ( m + 3n )
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: Pb ( m ) Sb ( 2n ) Te ( m + 3n )