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As part of the retrofitting of the Golden Gate Bridge and installation of a suicide barrier , starting in 2019 the railings on the west side of the pedestrian walkway were replaced with thinner , more flexible slats in order to improve the bridge 's aerodynamic tolerance of high wind to .
 location: Golden Gate Bridge
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: Golden Gate Bridge 
Answer:
 location: Golden Gate Bridge