The evidence provided for this claim consists only of general background information about labor unions and worker rights from web searches, but none of the sources specifically mention the details—better pay, benefits, working conditions, or reimbursement for damaged protective gear—as being sought by negotiators at United Food and Commercial Workers Local 7. Therefore, the claim cannot be corroborated by the provided evidence.

The provided web search results discuss labor law and collective bargaining processes generally, but none of the sources confirm that negotiations between the company and the union specifically lasted for eight months before a strike was called. This detail appears to be specific to the original article's context.

The Wikipedia evidence confirms the existence and background of JBS USA and its connection to Swift & Company, but none of the provided sources confirm the specific event: that thousands of employees walked off the job on March 16 protesting unfair labor practices. The evidence is insufficient to corroborate the date or the specific protest action.

The provided Wikipedia evidence discusses the NLRB and labor law generally, but none of the sources confirm the specific detail that the union agreed to withdraw seven unfair labor practice claims as part of the agreement with JBS. This detail appears to be specific to the original article's context.