21837
But last year Hitachi Ltd. surprised Japan 's electronics industry when it accused Korea 's Samsung Electronics Co. of using Hitachi technology to make dynamic random - access memory chips .
 last year, Hitachi Ltd., Japan, Korea, Samsung Electronics Co., Hitachi
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: date, organization, person, geographical social political, national religious political, facility, cardinal, location, work of art, law, event, product, ordinal, percent, time, quantity, money, language 
Text: {0} 
Answer:
 last year, Hitachi Ltd., Japan, Korea, Samsung Electronics Co., Hitachi