Text: Most worrying were the Seljuk Turks, who came out of the east in the 11th century to wrest large parts of Asia Minor from Constantinople's control.
Entailment: The Seljuk Turks were the most worrying, as they came out of the east in the 11th century, to wrest large parts of Asia Minor from Constantinople's control.
Contradiction: Most worrying were the Christian Crusaders, who took control of Constantinople's land and converted the people.