64998
In October 1964 he joined the Hep Stars as keyboardist and they made a breakthrough in March 1965 with their hit " Cadillac " , eventually becoming the most celebrated of the Swedish 1960 s pop bands .
 Hep Stars
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Hep Stars