DHC

Item 4 of the Schedule 13D is hereby supplemented as follows: On June 30, 2023, an affiliate of the Reporting Person delivered a letter to the Chairman of the Board of Trustees of the Issuer (the "Letter") with respect to the Issuer's then-proposed merger with Office Properties Income Trust (the "Proposed Merger"). On September 1, 2023, the Issuer and Office Properties Income Trust publicly announced the mutual termination of the merger agreement relating to the Proposed Merger. The Proposed Merger was abandoned and never consummated, and the matters discussed in the Letter are no longer pending. Accordingly, the Letter does not reflect the Reporting Person's current plans or intentions with respect to the Issuer.

Item 4 of the Schedule 13D is hereby supplemented as follows: On June 30, 2023, an affiliate of the Reporting Person delivered a letter to the Chairman of the Board of Trustees of the Issuer (the "Letter") with respect to the Issuer's then-proposed merger with Office Properties Income Trust (the "Proposed Merger"). On September 1, 2023, the Issuer and Office Properties Income Trust publicly announced the mutual termination of the merger agreement relating to the Proposed Merger. The Proposed Merger was abandoned and never consummated, and the matters discussed in the Letter are no longer pending. Accordingly, the Letter does not reflect the Reporting Person's current plans or intentions with respect to the Issuer.