(LEAD) Group of Samsung Electronics shareholders vows legal action against tentative wage deal with union | Yonhap News Agency

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(ATTN: UPDATES with more details in last 3 paras)SEOUL, May 21 (Yonhap) -- A group of shareholders of Samsung Electronics Co. on Thursday called the tentative wage deal struck between the company and its labor union illegal, vowing to take legal action against it.Late Wednesday, Samsung and its larg