source: In the 5th century Slavs started to move into the area.
target: Around the year 400 Slaves began moving into the area.
references: Around the year 400 Slaves began moving into the area. Slavs began moving into the area in the 5th century. Slavs started moving into the area in the 5th century. Slavs moved into the place in the 5th century. in the 1400s, Slavs began to move into the area. Slavs started to move there in the 400s. Slavs moved to the area in the 5th century. In the 5th century Slavs began moving into the area. In the 5th century, Slavs started to move into the area. The Indo-European people who speak slavic languages started to move in this area in the 5th century