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OTTHO (On the Tip of my THOught) is an information seeking system designed for solving a language game which demands knowledge covering a broad range of topics, such as movies, politics, literature, history, proverbs, and popular culture. OTTHO implements a knowledge infusion process in order to provide a background knowledge which allows a deeper understanding of the items it deals with. The knowledge infusion process consists of two steps: 1) extracting and modeling relationships between words extracted from several knowledge sources; 2) reasoning on the induced models in order to generate new knowledge. OTTHO extracts knowledge from several sources, such as a dictionary, news, Wikipedia, and various unstructured repositories and creates a memory of linguistic knowledge and world facts. Starting from some external stimuli (e.g. words) depending on the task to be accomplished, the reasoning mechanism allows retrieving some specific pieces of knowledge from the memory created in the previous step. OTTHO has a great potential for more practical applications besides solving a language game. It could be used for implementing an alternative paradigm for associative information retrieval, for computational advertising and recommender systems.