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At this point the entire crowd wanted to disperse , but the police would n't let anyone leave , I called 911 twice for help , to ask what the police wanted us to do , because they did n't once say anything with a megaphone to the crowd , and anyone who asked what they wanted us to do , was arrested and brutalized . " This gives us a baseline to know what the population status is now and look at trends over time . One character symbols such as dollar , at-sign , percent etc. Its difficult to get a complete list and to know what the pronunciation of some of these are ( e.g hash or pound sign ) . This allows them to understand what the organization as a whole can do for them . This is also the case for RDR KBS where there would be a number of meetings to determine what the system was to achieve and the domain to be covered .