14184
Identification and characterization of the formation of the N - halamine bonds ( > N - X with X = Cl or Br or I ) by physical techniques such as Fourier transform infrared spectroscopy ( FTIR ) , nuclear magnetic resonance spectroscopy ( NMR ) , energy - dispersive X - ray spectroscopy ( EDX ) , X - ray photoelectron spectroscopy ( XPS ) , and by chemical reactions are described .
 Chemical: N - halamine; Chemical: N; Chemical: Cl; Chemical: Br; Chemical: I
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: N - halamine; Chemical: N; Chemical: Cl; Chemical: Br; Chemical: I