Complex sentence: In exchange Essad Pasha agreed to neutralize big group of about 20.000 kachaks from Kosovo and Macedonia, led by Isa Boletini and supported by Ismail Qemali and his Provisional Government of Albania and to help Kingdom of Serbia to get part of sea coast north of Black Drin.
Split into simpler sentences: In exchange Essad Pasha agreed to neutralize big group of about 20.000 kachaks from Kosovo and Macedonia. They were led by Isa Boletini and supported by Ismail Qemali and his Provisional Government of Albania and to help Kingdom of Serbia to get part of sea coast north of Black Drin.