Complex sentence: Seven Up was actually part of the "World in Action" between 1963 and 1998 documentary series which was award-winning but also controversial and gritty dramas such as "A Family at War" (1970--72).
Split into simpler sentences: Seven Up was part of the "World in Action" documentary series between 1963 and 1998 which won awards but was controversial. The company produced gritty dramas such as "A Family at War" (1970--72).