24659
This also holds for the dc - Pockels beta ( - omega ; omega , 0 ) , Kerr gamma ( - omega ; omega , 0 , 0 ) and electric field second harmonic generation gamma ( - 2 omega ; omega , omega , 0 ) effects , although the computed nuclear relaxation ( nr ) vibrational contributions are smaller in magnitude than the static ones .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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