NEWTON, Mass.--(BUSINESS WIRE)--Senior Housing Properties Trust (NYSE:SNH), Hospitality Properties Trust (NYSE:HPT), Select Income REIT (NYSE:SIR) and Government Properties Income Trust (NYSE:GOV) (each a “REIT” and, collectively, the “REITs”) today announced that they have acquired combined economic ownership of approximately half of Reit Management & Research LLC (“RMR”). Each of the REITs is managed by RMR and, simultaneously with the REITs’ acquisition of ownership in RMR, the managemen