Context: Guinea-Bissau is a republic. In the past, the government had been highly centralized. Multi-party governance was not established until mid-1991. The president is the head of state and the prime minister is the head of government. Since 1974, no president has successfully served a full five-year term.

Question: What country is listed as a republic?
Answer: Guinea-Bissau

Question: When had the government been highly centralized?
Answer: In the past

Question: When was multi-party governance established?
Answer: mid-1991

Question: Who is the head of state?
Answer: president

Question: Who is the head of government?
Answer: prime minister