original: extensions were added in 1980 at both ends of the bloor-danforth line .
simplifications: extensions were added at both ends of the bloor-danforth line in 1980 . extensions were added in 1980 at both ends of the bloor-danforth line . extensions were added in 1980 at both ends of the bloor-danforth line . extensions were added to both ends of the bloor-danforth line in 1980 . extensions were added in 1980 at both ends of the bloor-danforth line . the bloor-danforth line was extended at both ends in 1980 . extensions were added in 1980 at both ends of the bloor-danforth line . extensions were added in 1980 at both ends of the bloor-danforth line .