Complex sentence: President Ali Abdullah Saleh then invited Hussein al-Houthi to a meeting in Sana'a, but Hussein declined, so on 18 June 2004 Saleh sent government forces to arrest Hussein.
Split into simpler sentences: President Ali Abdullah Saleh then invited Hussein al-Houthi to a meeting in Sana'a, but Hussein declined. On 18 June 2004 Saleh sent government forces to arrest Hussein.