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In the final scene of Richard Wagner 's 1869 opera " Das Rheingold " , the god Froh summons a rainbow bridge , over which the gods cross to enter Valhalla .
 person: Richard Wagner; person: Froh; location: Valhalla
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Richard Wagner, Froh, Valhalla 
Answer:
 person: Richard Wagner; person: Froh; location: Valhalla