1955
Two of these airports , George Bush Intercontinental Airport and William P. Hobby Airport , offer commercial aviation service to a variety of domestic and international destinations and served 55 million passengers in 2016 .
 George Bush Intercontinental Airport, William P. Hobby Airport
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 George Bush Intercontinental Airport, William P. Hobby Airport