Complex sentence: Salas later helped the New Jewel Movement in the liberation of the island of Grenada from the dictator Eric Gairy in 1979, and became the chairman of the Free Nelson Mandela Movement in San Antonio, Texas.
Split into simpler sentences: Salas later helped the New Jewel Movement in the otherthrow of Eric Gairy in 1979, the leader of the island of Grenada. He also became the chairman of the Free Nelson Mandela Movement in San Antonio, Texas.