Complex sentence: In 1952 he began his collaborations with the press of "Valencia" in "Levante": this would be one of his more prominent facets and one he would continue on with in "Destino" and in "La Vanguardia".
Split into simpler sentences: In 1952 he began his collaborations with the press of "Valencia" in "Levante": this would be one of his more prominent facets. He would continue with it in "Destino" and in "La Vanguardia".