Efficient communication is a major challenge for emergency responders during crisis management. Reports show that missing information and information overload are important factors that determine the success of crisis management. We propose a method as basis for a software system that improves text or voice-based communication. Communication is split into segments and the system determines from the content of the communication, the tasks of actors and their locations for which responders in the crisis the information is relevant. The system is tested on data recorded at a fire fighting disaster management exercise and found to be accurate enough to be useful.