Problem: The creation of modern-day Eritrea is a result of the incorporation of independent, distinct kingdoms and sultanates (for example, Medri Bahri and the Sultanate of Aussa) eventually resulting in the formation of Italian Eritrea. In 1947 Eritrea became part of a federation with Ethiopia, the Federation of Ethiopia and Eritrea. Subsequent annexation into Ethiopia led to the Eritrean War of Independence, ending with Eritrean independence following a referendum in April 1993. Hostilities between Eritrea and Ethiopia persisted, leading to the EritreanEthiopian War of 19982000 and further skirmishes with both Djibouti and Ethiopia.
What persisted and led to the Eritrean-Ethiopian War of 1998-2000?
The answer is the following: Hostilities between Eritrea and Ethiopia

Problem: He was killed on 2 March 2009, possibly by soldiers in retaliation for the assassination of General Batista Tagme Na Waie, the head of the joint chiefs of staff, killed in an explosion. Vieira's death did not trigger widespread violence, but there were signs of turmoil in the country, according to the advocacy group Swisspeace. Malam Bacai Sanha was elected after a transition. In the 2009 election to replace the assassinated Vieira, Sanha was the presidential candidate of the PAIGC while Kumba Iala was the presidential candidate of the PRS.
When was Vieira killed?
The answer is the following: 2 March 2009

Problem: Two inland ports on rivers serve Oklahoma: the Port of Muskogee and the Tulsa Port of Catoosa. The only port handling international cargo in the state, the Tulsa Port of Catoosa is the most inland ocean-going port in the nation and ships over two million tons of cargo each year. Both ports are located on the McClellan-Kerr Arkansas River Navigation System, which connects barge traffic from Tulsa and Muskogee to the Mississippi River via the Verdigris and Arkansas rivers, contributing to one of the busiest waterways in the world.
How many tons of cargo does the Tulsa Port of Catoosa ship annually?
The answer is the following: over two million

Problem: The eleven prefecture-level divisions of Zhejiang are subdivided into 90 county-level divisions (36 districts, 20 county-level cities, 33 counties, and one autonomous county). Those are in turn divided into 1,570 township-level divisions (761 towns, 505 townships, 14 ethnic townships, and 290 subdistricts). Hengdian belongs to Jinhua, which is the largest base of shooting films and TV dramas in China. Hengdian is called "China's Hollywood".
How many prefecture-level divisions of Zhejiang are there?
The answer is the following:
eleven