51906
A typical SPF HELO policy may execute four or more DNS queries : ( 1 ) TXT record ( SPF type was obsoleted by RFC 7208 ) , ( 2 ) A or AAAA for mechanism , ( 3 ) MX record and ( 4 + ) A or AAAA for each MX name , for mechanism .
 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