Complex sentence: He opposed the efforts of Thomas Greenway and D'Alton McCarthy to eliminate French-language services in Manitoba and the North West Territories, and condemned Louis Riel's second rebellion in 1886.
Split into simpler sentences: He opposed the efforts of Thomas Greenway and D'Alton McCarthy to eliminate French-language services in Manitoba and the North West Territories. He also condemned Louis Riel's second rebellion in 1886.