What was the change in Real Estate between 2018 and 2019?
{"Equity securities - U.S. holdings(1)": {"2019": 24586, "2018": 20469}, "Equity funds - U.S. holdings(1) (7)": {"2019": "\u2014", "2018": 54}, "Bond funds - government(4) (7)": {"2019": 33991, "2018": 19146}, "Bond funds - other(5) (7)": {"2019": 207901, "2018": 202393}, "Real estate(6) (7)": {"2019": 2979, "2018": 2652}, "Cash and cash equivalents(2)": {"2019": 5700, "2018": 5866}, "Partnerships(3)": {"2019": 7539, "2018": 9172}, "Total fair value of plan assets": {"2019": 282696, "2018": 259752}}
real_estate_2019 = df["Real estate(6) (7)"]["2019"]
real_estate_2018 = df["Real estate(6) (7)"]["2018"]
answer = real_estate_2019 - real_estate_2018