39235
Vehicle and engine manufacturing was especially successful , though the heavy industry was less ubiquitous than in the Ruhr area .
 location: Ruhr
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: Ruhr 
Answer:
 location: Ruhr