84324
Between 1968 and 1975 , a variety of pegs to gold were put in place , eventually culminating in a sudden end , on August 15 , 1971 , to the convertibility of dollars to gold later dubbed the Nixon Shock .
 Nixon Shock
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:
 Nixon Shock