Complex sentence: They demanded that the murder charge against the Indonesian suspect be investigated, with slogans and green flags and banners asking to "save Siti Aisyah" and free her from political conspiracy.
Split into simpler sentences: They demanded that the murder charge against the Indonesian suspect be investigated. They proteste with display of green flags and banners, with slogans reading to "save Siti Aisyah" and free her from political conspiracy.