Complex sentence: By 1915, electricity generation and distribution became the main Meralco's main income generator, overtaking its public transportation operations in terms of revenue and in 1919, changed its official name to Manila Electric Company.
Split into simpler sentences: By 1915, electricity generation and distribution became the main Meralco's main income generator, overtaking its public transportation operations in terms of revenue. In 1919, it changed its official name to Manila Electric Company.