Complex sentence: Druzhba was built in 1975, with a seating capacity of 4,700 people for sporting events and 5,100 for concerts and is the regular home venue of BC Donetsk basketball team and HC Donbass Ice Hockey team.
Split into simpler sentences: Druzhba was built in 1975, with a seating capacity of 4,700 people for sporting events. Now it is the regular home venue of BC Donetsk basketball team and HC Donbass Ice Hockey team.