Complex sentence: Many People went to seek refuge in a rainforst in La Vang, and became very ill. They were praying when a Lady appeared wearing a traditional Vietnamese dress called an Ao Dai holding a child in her arms, and with two angels beside her.
Split into simpler sentences: Many People went to seek refuge in a rainforst in La Vang. Many got very ill. They were praying when a Lady appeared wearing a traditional Vietnamese Dress called an Ao Dai holding a child in her arms with two angels beside her.