Complex sentence: Galán ran for President of Colombia in 1982 but lost to Belisario Betancur but the results of that election gave strength to the new political movement of "Nuevo Liberalismo" that he had founded in 1979.
Split into simpler sentences: Galán ran for President of Colombia in 1982 but lost to Belisario Betancur. The results of that election gave strength to the new political movement of "Nuevo Liberalismo" that he had founded in 1979.