Complex sentence: The construction of an independent network is possible thanks to radio frequency reservations held by company, witch in November 2007 won a tender organized by the President of the Polish Electronic Communications Office and obtained frequency reservations in the 1800 MHz band.
Split into simpler sentences: The construction of an independent network is possible thanks to radio frequency reservations held by company. In November 2007 company won a tender organized by the President of the Polish Electronic Communications Office and obtained frequency reservations in the 1800 MHz band.