Problem: Does "Greece was the largest foreign investor in Albania in 2013, the third in Bulgaria, in the top-three in Romania and Serbia and the most important trading partner and largest foreign investor in the former Yugoslav Republic of Macedonia." answer the question "Who is Greece the most important trading partner to?"

A: yes

Problem: Does "The vast Alberta bitumen resources are believed to have started out as living material from marine plants and animals, mainly algae, that died millions of years ago when an ancient ocean covered Alberta." answer the question "What did the Alberta bitumen mines begin as?"

A: yes

Problem: Does "With the purpose of "Frenchizing" the region, the Rot-un-Wiss has not been recognized by Paris." answer the question "Which French city did not recognize the Rot-un-Wiss flag?"

A:
yes