Complex sentence: Heredia is a rapidly industrialising city in the Heredia province of Costa Rica, of which it is the capital; it is 10 kilometers to the north of the country's capital, San José.
Split into simpler sentences: Heredia is a city located in the Heredia province of Costa Rica and is the capital of that province. It is currently undergoing a rapid process of industrialization and is located 10 kilometers north of the country's capital, San José.