Which labor group tried to organize miners in anthracite regions in pa but was arrested by franklin gowen?

The correct answer is Molly Maguires

This was a secretive labor organization that comprised of coal miners. They were responsible for various terrorist acts in the coalfields of Pennsylvania. This included threatening mining supervisors as a way of fighting against oppressive mine owners

The name of the labor group who tried to organize the miners in anthracite countries is Molly Maguires. This group is an Irish 19th-century secret society in Ireland. Some of its members were arrested by Franklin Gowen who was convicted of murder and executed by hanging in 1877 to 1878.