Complex sentence: The Ostrów/EPOM location is a place of well attended annual gliding competitions "Ostrow Glide" ("Zawody o Puchar Prezydenta Miasta") and the 4th FAI European Glider Aerobatic Championships (19 July 1998--2 August 1998) had been organized there.
Split into simpler sentences: The Ostrów/EPOM location is a place of well attended annual gliding competitions "Ostrow Glide" ("Zawody o Puchar Prezydenta Miasta"). Also, the 4th FAI European Glider Aerobatic Championships (19 July 1998--2 August 1998) had been organized there.