[1]

On August 31, 2016, the Company terminated its lease for the regional management and leasing office at 3141 Fairview Park Drive, located in Falls Church, Virginia. Accordingly, the Company no longer has any continuing involvement with 3141 Fairview Park Drive and recorded the partial sale under the full accrual method of accounting. See Note 4, “Investment in Unconsolidated Real Estate Ventures,” for further information. The years ended December 31, 2017 and 2016 include impairment charges related to the Brandywine - AI Venture. See Note 4, “Investment in Unconsolidated Real Estate Ventures,” for further information.

[2]

The MAP Venture represents a joint venture formed between the Company and MAP Ground Lease Holdings LLC, an affiliate of Och-Ziff Capital Management Group, LLC, on February 4, 2016. The MAP Venture’s business operations, including properties in Richmond, Virginia; Metropolitan Washington, D.C.; New Jersey/Delaware and Pennsylvania Suburbs, are centrally managed with the results reported to management of the Company on a consolidated basis. As a result, the investment in the MAP Venture is separately presented. All other unconsolidated real estate ventures are managed consistently with the Company’s regional segments.

[3]

See footnote (a) to the “Real estate investments, at cost” table above for further information regarding this segment.

[4]

Investment in real estate ventures does not include the $1.1 million negative investment balance in one real estate venture as of December 31, 2015, which is included in the “Other Liabilities” caption of the consolidated balance sheets. The Company disposed of its interest in this venture during 2016. See Note 4, "Investment in Unconsolidated Real Estate Ventures," for further information. The decrease in the Company’s investment balance primarily relates to distributions from the G&I VII Austin Office LLC real estate venture. See Note 4, “Investment in Unconsolidated Real Estate Ventures,” for further information.