Complex sentence: Later overwhelming public anger over Pakistan's defeat by Bangladesh and the division of Pakistan into two parts boiled into street demonstrations throughout Pakistan, rumours of an impending coup d'état by younger army officers against the government of President Mohammed Agha Yahya Khan swept the country.
Split into simpler sentences: Later overwhelming public anger over Pakistan's defeat by Bangladesh and the division of Pakistan into two parts boiled into street demonstrations throughout Pakistan. Rumours of an impending coup d'état by younger army officers against the government of President Mohammed Agha Yahya Khan swept the country.