Complex sentence: On 10 September, 1897 at the Lattimer mine near Hazleton, Pennsylvania, men under the authority of the Luzerne County sheriff fired on a peaceful labor demonstration made up of mostly Polish, Slovak, and Lithuanian anthracite miners.
Split into simpler sentences: On 10 September, 1897 at the Lattimer mine near Hazleton, Pennsylvania. Men under the authority of the Luzerne County sheriff fired on a peaceful labor demonstration made up of mostly Polish, Slovak, and Lithuanian anthracite miners.