8810
All of the residents live in a densely populated 300 hectare area ( the most densely populated residential area in the state of North Rhine-Westphalia with steelworks , port and railway lines acting as physical barriers cutting off the area from the city centre and other residential districts ) .
 location: North Rhine-Westphalia
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:
 location: North Rhine-Westphalia