Question: The United Democratic Front was formed in opposition to the Pakistani party of which Prime Minister, who served from 1973-77?
Sentence (from "United Democratic Front (Pakistan)"): United Democratic Front (Urdu: قومی متحدہ محاذ ‎ ) was formed in Pakistan in 1973 in opposition to ruling Pakistan Peoples Party of Prime Minister Zulfikar Ali Bhutto.
Relevant evidence: Yes