12838
Annually , it publishes approximately 200 new titles , which are sold in bookstore s , department store s an book club s. Gummerus Oy consists of four divisions : In December 2009 Gummerus and Sanoma agreed on an arrangement concerning the merger of WS Bookwell and Gummerus Printing .
 Gummerus, Gummerus, Sanoma, Gummerus
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Gummerus, Gummerus, Sanoma, Gummerus