Complex sentence: Costa Calma is a touristic community in which brought tourism in the 1970s which created famous hotels and also brought in restaurants as well as businesses which brought economic development to the vicinity of Costa Calma.
Split into simpler sentences: Costa Calma is a tourist community which brought tourism in the 1970s and created famous hotels. It also brought in restaurants as well as businesses which brought economic development to the vicinity of Costa Calma.