Complex sentence: The Special police ignored the information that people had been inflamed by pamphlets distributed by a plane, and did not pay attention to the fact that National Volunteer Army members had sounded a siren and had been excited with bamboo spears.
Split into simpler sentences: The Special police ignored the information that people had been inflamed by pamphlets distributed by a plane. They ignored the National Volunteer Army members, who had sounded a siren and publicly demonstrated with bamboo spears.