101980
The kiss cam tradition originated in California in the early 1980 s , as a way to fill in the gaps in play in professional baseball games , taking advantage of the possibilities of the then-new giant video screens .
 California
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:
 California