What is the sentiment of this news? Please choose an answer from {strong negative/moderately negative/mildly negative/neutral/mildly positive/moderately positive/strong positive}.

A historic day in a hard-fought battle as workers at Amazon's JFK8 fulfillment center have voted to unionize. Counting for the Staten Island, NY warehouse concluded this morning, approving the formation of a union: 2,654 to 2,131.
moderately positive