51814
It became the first airline in the world to operate sustained regular jet services on 15 September 1956 with the Tupolev Tu-104 .
 Tupolev Tu-104
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Tupolev Tu-104