In order to model and reinforce the process of using evidence in a history course, I have introduced numerous team excises in which students engaged in this activity. Here is an example that is part of the larger process described at An example of Holistic Decoding ina History Course.
The database is currently locked to new entries and other modifications, probably for routine database maintenance, after which it will be back to normal.
The system administrator who locked it offered this explanation: Major Server Maintenance, Access wil be restored soon.