Does "Euornithes also included the first avialans to develop true pygostyle and a fully mobile fan of tail feathers, which may have replaced the "hind wing" as the primary mode of aerial maneuverability and braking in flight." contain the correct answer to "What may have replaced the "hind wing" as the primary mode of aerial maneuverability?"

A: yes

Does "Until the second half of the 15th century the empire had a Christian majority, under the rule of a Muslim minority." contain the correct answer to "What group ruled the empire until the 15th century?"

A: yes

Does "However, the Iowa caucuses yielded unexpectedly strong results for Democratic candidates John Kerry, who earned 38% of the state's delegates and John Edwards, who took 32%." contain the correct answer to "Which two candidates had surprising results despite Howard Dean being the strong front-runner?"

A:
yes