<human>: Does the sentence "Gaddafi become openly hostile to Egypt's leader, calling for Sadat's overthrow, and when Sudanese President Gaafar Nimeiry took Sadat's side, Gaddafi by 1975 sponsored the Sudan People's Liberation Army to overthrow Nimeiry." answer the question "Who was the president of Sudan in 1975?"

OPTIONS:
- yes
- no
<bot>: yes