2783
The cars run through a " water box " ( formerly a " bleach box " , before bleach was replaced by flammable traction compound , which produced spectacular , and dangerous , flame burnouts ; the hazard led NHRA to mandate use of water in the 1970 s When the first light beam is broken by a vehicle 's front tire ( s ) , the vehicle is " pre-staged " ( approximately from the starting line ) , and the pre-stage indicator on the tree is lit. When the second light beam is broken , the vehicle is " staged " , and the stage indicator on the tree is lit. Vehicles may then leave the pre-stage beam , but must remain in the stage beam until the race starts .
 organization: NHRA
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 organization: NHRA