Complex sentence: The 60s, 70s and 80s would be a barren time for the national basketball team, they were however successful at the Mediterranean Games winning two bronze medals in 1967 and 1983, one silver medal in 1971 and one gold medal in 1987.
Split into simpler sentences: The 60s, 70s and 80s would be a barren time for the national basketball team. They were, however, successful at the Mediterranean Games, winning two bronze medals in 1967 and 1983, one silver medal in 1971, and one gold medal in 1987.