Complex sentence: In the early 1970s, it was replaced by "Send for Kelly", by "Danny's Tranny" in 1975, and "Tricky Dicky" in 1979.
Split into simpler sentences: In the early 1970s, it was replaced by "Send for Kelly". That strip was replaced with "Danny's Tranny" in 1975, and then "Tricky Dicky" in 1979.