Problem: Does "In addition, social conditions have changed and many multiracial people do not believe it is socially advantageous to try to "pass" as white." answer the question "What was it once considered socially advantageous to do?"

A: yes

Problem: Does "Many of these regions coincided to a large extent with the borders of the Byzantine Empire of the late 11th century and the Eastern Mediterranean areas of ancient Greek colonization." answer the question "What other culture did the Greek states share boarders with ?"

A: yes

Problem: Does "A separate action on the fort town of Kars in eastern Turkey led to a siege, and a Turkish attempt to reinforce the garrison was destroyed by a Russian fleet at Sinop." answer the question "When the Turkish tried to provide reinforcements, where were they stopped at?"

A:
yes