1. A method comprising (a) receiving a first signal, the first signal indicative of a selection of a legal document, the legal document being associated with a set of metadata; (b) based upon the set of metadata, picking a first cluster of legal documents and a second cluster of legal documents, the first cluster of legal documents being associated with a first legal topic and the second cluster of legal documents being associated with a second legal topic; and (c) transmitting a second signal relating to the first cluster of legal documents and the second cluster of legal documents.