16607
The luminescent and magnetic ( relaxivity ) properties of the Eu : GdF3 nanoparticles have been also evaluated in order to assess their potentiality as " in vitro " optical biolabels and contrast agent for magnetic resonance imaging .
 Chemical: Eu; Chemical: GdF3
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: Eu, GdF3 
Answer:
 Chemical: Eu; Chemical: GdF3