Complex sentence: The idea to build a satellite town Kebayoran Baru to accommodate the growing population of Jakarta was launched in 1948; the plan was approved in September 1948, just two months after it was first presented.
Split into simpler sentences: The idea to build a satellite town Kebayoran Baru to accommodate the growing population of Jakarta was launched in 1948. The government had already approved the plan by September 1948, just two months after it was first presented.