Problem: Libya's case against Britain and the US concerns the dispute over their demand for extradition of Libyans charged with blowing up a Pan Am jet over Lockerbie in 1988.

Based on that paragraph can we say the following?
One case involved the extradition of Libyan suspects in the Pan Am Lockerbie bombing.
****
Answer: yes


Problem: From 1016 to 1030 the Normans were pure mercenaries, serving either Byzantines or Lombards, and then Sergius of Naples, by installing their leader Rainulf in the fortress of Aversa in 1030, gave them their first pied-à-terre and they began an organized conquest of the land.

Based on that paragraph can we say the following?
Rainulf was the leader of the Normans.
****
Answer: yes


Problem: Waste in the ponds produced by leaching gold from ore is a source of potential environmental dangers.

Based on that paragraph can we say the following?
Mine waste-water poses an environmental hazard.
****
Answer: yes


Problem: Cuban Leader Fidel Castro sent a letter to United Nations Secretary-General Kofi Annan assuring him that Cuba will follow anti-terrorism treaties in the wake of last month's terrorist attacks against New York and Washington.

Based on that paragraph can we say the following?
Castro visits the UN.
****
Answer:
no