Complex sentence: The red brick South Stand built in 1929 had the same architect as the similar structure at the Ibrox Park of "Old Firm" rivals Rangers F.C. Parkhead F.C. before its dissolution was arguably the most successful Scottish junior side.
Split into simpler sentences: The red brick South Stand built in 1929 had the same architect as the similar structure at the Ibrox Park of "Old Firm" rivals Rangers. Parkhead FC before its dissolution was arguably the most successful Scottish junior side.