Aiming at the problems of lack of potential implicit relation mining between entities and insufficient head entity information extraction in existing methods. a head entity-enhanced multi-hop attention implicit relations joint mining model Multi-Air (multi-hop attention implicit relations joint mining method) was proposed. The method first uses the BERT (bidirectional encoder represen... https://www.bekindtopets.com/mega-price-Honeywell-DF300-N95-Flat-Fold-Disposable-Respirators-limited-choice/