55462
Because they needed an aircraft with a longer range than the MD-80s , the airline acquired Boeing 737-300 aircraft and the DC-9s and MD-80s were returned to the leasing companies while additionally a 737-400 was acquired .
 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