Complex sentence: Following a quiet end to the 1960s, Park had an inconsistent time during the 1970s which was mostly down to their lack of success in the league although the 2nd XI celebrated two championship wins in 1971 and 1977.
Split into simpler sentences: Following a quiet end to the 1960s, Park had an inconsistent time during the 70s. This was mostly down to their lack of success in the league although the 2nd XI celebrated two championship wins in 1971 and 1977.