NET
15 At that time Tyre will be forgotten for seventy years, the typical life span of a king. At the end of seventy years Tyre will try to attract attention again, like the prostitute in the popular song:
Darby
15 And it shall come to pass in that day, that Tyre shall be forgotten seventy years, according to the days of one king. At the end of seventy years it shall be for Tyre as the harlot's song.
KJV
15 And it shall come to pass in that day, that Tyre shall be forgotten seventy years, according to the days of one king: after the end of seventy years shall Tyre sing as an harlot.