xsd:string A Recipient (who may or may not be agentive) ends up in possession of a Mass_theme (which may be conceptualized as a single mass entity, or may be a group of individual entities). Some lexical units (e.g. stockpile) specifically indicate an intentional Recipient. This frame differs from Gathering_up in that this frame refers specifically to the acquisition and (according to expectation) long-term possession of entities, rather than (as in the Gathering_up frame) simply talking about causing a group of entities to be located in the same place. In sum, Gathering_up concerns (co-)locations, but Amassing concerns possession.