8568
For a surface in " R " , tangent planes at different points can be identified using a natural path-wise parallelism induced by the ambient Euclidean space , which has a well-known standard definition of metric and parallelism .
 person: Euclidean
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: Euclidean