61456
Yves Klein , Martial Raysse , Niki de Saint Phalle , Wolf Vostell , David Hockney , Alex Katz , Malcolm Morley , Ralph Goings , Audrey Flack , Richard Estes , Chuck Close , Susan Rothenberg , Eric Fischl , John Baeder and Vija Celmins were a few who became prominent between the 1960 s and the 1980 s .
 Yves Klein, Martial Raysse, Niki de Saint Phalle, Wolf Vostell, David Hockney, Alex Katz, Malcolm Morley, Ralph Goings, Audrey Flack, Richard Estes, Chuck Close, Susan Rothenberg, Eric Fischl, John Baeder, Vija Celmins
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:
 Yves Klein, Martial Raysse, Niki de Saint Phalle, Wolf Vostell, David Hockney, Alex Katz, Malcolm Morley, Ralph Goings, Audrey Flack, Richard Estes, Chuck Close, Susan Rothenberg, Eric Fischl, John Baeder, Vija Celmins