Complex sentence: The space flight Head Quarters established on Olga picks up an SOS signal coming from the Earth where the first colonists of Darius originated before colonizing Darius; the signal included the description of alien ships similar to that of the Belser Army.
Split into simpler sentences: The space flight Headquarters established on Olga picks up an SOS signal coming from Earth, where the first colonists originated before colonizing Darius. The signal included the description of alien ships similar to those of the Belser Army.