In this paper, a solution for semantic annotation of Consumers Generated Content, based on the actions of a multiagent system, is presented. This solution is designed in the context of an spin-off which was born from Minerva project for mobile services 1 . Our proposal aims to build a Mobile Web 2.0 platform for the dissemination of interesting events, captured by users through mobile phones. The multiagent system creates an agent for each event, which suggests and manages several semantic features linked to an Ontology related to events.Supported by the project 2C/040 WeTeVe of Minerva Platform of mobility services, http://www.proyectominerva.org/ A coordinated project of Andalusian Consejer´ıa de Innovación, Ciencia y Empresa, Vodafone, Universidad de Sevilla, Parque Cient´ıfico y Tecnológico Cartuja'93, Sevilla Global S.A.M., ETICOM and AICIA.