Complex sentence: Premio Internacional de Poesía Ciudad de Melilla is the biggest poetry award in the Spanish-speaking world, receiving every year more than 600 manuscripts, mostly from Spain, Argentina, Colombia and Uruguay, but also from the United States and other parts of the world.
Split into simpler sentences: Premio Internacional de Poesía Ciudad de Melilla is an important poetry award in the Spanish-speaking world. Candidates are mostly from Spain, Argentina, Colombia and Uruguay, but also from the United States and other parts of the world.