25778
Early launched roller coasters used a catapult system powered by a diesel engine or a dropped weight to acquire their momentum , such as Shuttle Loop installations between 1977 - 1978 .
 Shuttle Loop
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Shuttle Loop