Complex sentence: After the presidential elections of April 19,1970 the National Popular Alliance accused the National Front of electoral fraud four years later, in 1974, the 19th of April movement surged as opposite the bipartisan interests of the National Front.
Split into simpler sentences: After the presidential elections of April 19,1970 the National Popular Alliance accused the National Front of electoral fraud. Four years later, in 1974, the 19th of April movement emerged as opposition to the bipartisan interests of the National Front.