A system comprising a referral acceptor; a referral coordinator coupled to the referral acceptor; a referral calculator coupled to the referral calculator; and an inputoutput device coupled to the referral coordinator. In one approach, a constraint matrix representing constraints for allocating subchannels to users in allocations of selected subchannels is computed, subject to the allocation constraint. The method may also include storing the user input information as part of a contextual history information record in a database memory, generating a response message to the selected at least one action request based on the contextual history information, and forwarding the response message to the user via a transmitter device. The online system transcribes the media content of the question and applies a web page template to the question content to generate a web page. The first member is moveable between a first position wherein the first receiver receives a portion of a first-sized fuel container, and a second position wherein the second receiver receives a portion of the second-sized fuel container. Each collection device randomly chooses one of the processing centers for analysis of the collected physiological data.