17108
The negative effect of SiO4 / 2F ( - ) units in F - Ti - MWW was eliminated selectively by convenient anion - exchange with various alkali chlorides .
 Chemical: SiO4; Chemical: 2F ( - ); Chemical: F - Ti; Chemical: alkali chlorides
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: SiO4; Chemical: 2F ( - ); Chemical: F - Ti; Chemical: alkali chlorides