Triple

Target entity: Ludlow Massacre
Context triple: [American labor movement, hasKeyEvent, Ludlow Massacre]

• A. Colfax massacre
  The Colfax massacre was an 1873 episode of racial and political violence in Louisiana in which white supremacists killed dozens of Black freedmen, marking one of the deadliest incidents of Reconstruction-era terror and undermining Black civil rights in the post–Civil War South.
• B. Matewan Massacre
  The Matewan Massacre was a 1920 violent confrontation between coal miners and company-hired lawmen in Matewan, West Virginia, that became a pivotal event in the American labor and unionization struggle.
• C. Marais des Cygnes massacre
  The Marais des Cygnes massacre was an 1858 attack in Kansas Territory in which pro-slavery militants executed a group of free-state men, becoming one of the most notorious episodes of violence in the Bleeding Kansas conflict.
• D. Pavonia Massacre
  The Pavonia Massacre was a 1643 attack by Dutch colonists on Lenape Native Americans in present-day Jersey City, New Jersey, that helped ignite the broader conflict known as Kieft's War.
• E. Ludlow strike chosen
  The Ludlow strike was a major 1913–1914 coal miners’ labor conflict in Colorado, marked by violent clashes between striking workers and company-hired forces, that became a pivotal event in U.S. labor history.
• F. None of above.
• G. Unsure - the case is ambiguous/there is not enough information to decide.