What is the company's total accrued benefits as at December 31, 2018 and 2019?
{"Pension benefits": {"2019": 8566, "2018": 10905}, "Other post-employment benefits": {"2019": 23508, "2018": 21330}, "Accrued benefit liabilities": {"2019": 32074, "2018": 32235}}
accrued_benefit_2018 = df["Accrued benefit liabilities"]["2018"]
accrued_benefit_2019 = df["Accrued benefit liabilities"]["2019"]
answer = accrued_benefit_2018 + accrued_benefit_2019