253795
The barrier reef tract forms a great arc , concentric with the Florida Keys , with the northern end , in Biscayne National Park , oriented north-south and the western end , south of the Marquesas Keys , oriented east-west .
 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