Complex sentence: Danforth line, an east-west line that was opened in 1966 and was last extended in 1980; the Scarborough RT, a partly elevated light metro line that was opened in 1985 and continues from the Bloor-Danforth line's eastern terminus.
Split into simpler sentences: Danforth line, an east-west line opened in 1966 and was last extended in 1980. The Scarborough RT, a partly elevated light metro line opened in 1985 that continues from the Bloor-Danforth Line's eastern terminus.