Question: Which president called for constitutional changes?
Sentence: The Greek Cypriot leadership believed that the rights given to Turkish Cypriots under the 1960 constitution were too extensive and designed the Akritas plan, which was aimed at reforming the constitution in favour of Greek Cypriots, persuading the international community about the correctness of the changes and violently subjugating Turkish Cypriots in a few days should they not accept the plan.
Answer in sentence: no