Complex sentence: Minister of Education Mohammad Yamin attended the opening ceremony, where Soeman compared the situation in Riau to that of Aceh and North Sumatra and declared that the people of Riau had been treated like stepchildren, and called for Yamin to send government teachers to support Setia Dharma.
Split into simpler sentences: Minister of Education Mohammad Yamin attended the opening ceremony, where Soeman compared the situation in Riau to that of Aceh and North Sumatra and declared that the people of Riau had been treated like stepchildren. He called for Yamin to send government teachers to support Setia Dharma.