Original sentence: Konrad seeked protection from the claims of his Piast cousin King Władysław I the Elbow-high of Poland at the Bohemian crown and in 1328 sweared allegiance to King John the Blind of Bohemia
Edited sentence: Konrad sought protection from the claims of his Piast cousin King Władysław I the Elbow-high of Poland at the Bohemian crown and in 1328 sweared allegiance to King John the Blind of Bohemia