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Water relaxation dynamics as probed by time - resolved fluorescence spectroscopy using Coumarin - 500 also reveals an overall linear trend with no characteristic feature around the solubilization inflation point .
 Chemical: Coumarin - 500
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: Coumarin - 500