Task: Question Generation
Input (English): Passage: In this period Muscovy was raided almost every year. Raids on Lithuania continued. Raids were concentrated along the border between the settled area and the empty steppe. The first  raid on Muscovy was in 1507. In 1511/12 there were raids along the whole border. In 1521 the Crimeans, in alliance with the Khan of Kazan, crossed the Oka and devastated the area around Moscow. After that raids continued. In 1512 and 1517  raiding parties were chased back to the steppe. In 1524 a Polish force reached the Black Sea. In 1558/59 Russian troops helped defend Zaporozhia south of Kiev and two raiding parties reached the Black Sea. In 1566 the Abatis Line was completed south of the Oka.
Output (English): For how many years did raids continue around Lithuania?