Complex sentence: In 2008, the contract workers at the El Salvador, and four other Codelco mines went on strike, suspending production on 16 April, demanding that Codelco fulfil agreements reached the year before regarding increases in pay and improvement of working conditions.
Split into simpler sentences: In 2008, contract workers at the El Salvador, and four other Codelco mines went on strike, suspending production on 16 April. They demanded that Codelco fulfil agreements reached the year before regarding increases in pay and improvement of working conditions.