6623
Ironically , while the PRR platform was built to high level standards ( a rarity on the SEPTA Regional Rail system ) , and was constructed before the Americans with Disabilities Act of 1990 , the hastily constructed RDG station platform are low level , and currently remain so .
 None
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:  
Answer:
 None