39367
In this parameterisation , the ratio of " t " to " r " can be interpreted geometrically as the stereographic projection of the line passing through the centre parallel to the " x " - axis ( see Tangent half-angle substitution ) .
 person: Tangent
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: Tangent 
Answer:
 person: Tangent