original: Extensions were added in 1980 at both ends of the Bloor-Danforth Line.
simplifications: Both ends of the Bloor-Danforth Line got additions in 1980 The Bloor-Danforth Line was extended on both sides in 1980. Both ends of the Bloor-Danforth Line got extensions. Both ends of the Bloor-Danforth Line were extended in 1980. The Bloor-Danforth Line was extended at both ends in 1980. Extensions were added in 1980. They were at both ends of the Bloor-Danforth Line. The Bloor-Danforth Line was extended in both directions in 1980. Extensions were added in 1980. The extensions were put in at both ends of the Bloor-Danforth Line. In 1980 both ends of the Bloor-Danforth line were extended. Extensions have been added at both ends of the Bloor-Danforth Line in 1980.