1. A graphical user interface of an application executing on a computing device for display to a user of the computing device, the graphical user interface comprising: a first field that displays a document on a display screen of the computing device, wherein the document comprises text; a second field that displays a tuple that has been assigned to the document, wherein the tuple corresponds to a portion of the document displayed in the first field, wherein the tuple comprises a first word or phrase, a second word or phrase, and a third word or phrase that relates the first word or phrase to the second word or phrase; and a graphical button that, when selected by the user, causes a data packet to be generated and transmitted to a data repository that is accessible to other users by way of a network, wherein the data packet comprises the tuple and relationship data, wherein the relationship data comprises first data that indicates that the tuple has been assigned to the document.