As journalists dealing with data and document sets, we find that the most interesting information is usually hidden in large, unstructured, and incomplete sets of documents. Especially information in public contracts: what the government is buying, how much money is being spent, and who are the suppliers. To answer these questions, four media organizations — La Nacion, CLIP, Ojo Público, and MuckRock — joined forces under the JournalismAI Collab and experimented with different machine learning tools and techniques in order to build a platform that helps investigative reporters understand and process unstructured documents to get useful insights.