Does "This is understandable, since there is no compelling authority within them." contain the correct answer to "What document was signed in 1999?"

A: no

Does "John's efforts to appear moderate and conciliatory had been largely successful, but once the rebels held London they attracted a fresh wave of defectors from John's royalist faction." contain the correct answer to "Who was the rebel baron leader?"

A: no

Does "The rise of the Ottoman Empire, culminating in the Fall of Constantinople in 1453, eroded the last remnants of the Byzantine Empire and cut off trading possibilities with the east." contain the correct answer to "In what year did Vasco da Gama sail around India and Africa?"

A:
no