Complex sentence: On December 10,1907, a general strike broke out in the San Lorenzo nitrate works and the strike spread to the Alto San Antonio works, initiating the 18 Pence Strike, the name referring to the size of the wage the day laborers were demanding.
Split into simpler sentences: On December 10,1907, a general strike broke out in the San Lorenzo nitrate works and the strike spread to the Alto San Antonio works. This was the start of the 18 Pence Strike, the name referring to the size of the wage the day laborers were demanding.