What is the change in capitalized benefit plans cost in 2019?
{"DB pension": {"2019": -193, "2018": -213}, "DC pension": {"2019": -110, "2018": -106}, "OPEBs": {"2019": -3, "2018": -3}, "Less: -- Capitalized benefit plans cost": {"2019": 59, "2018": 56}, "Less: -- Total post-employment benefit plans service cost included in operating costs": {"2019": -247, "2018": -266}, "Less: -- Other costs recognized in severance, acquisition and other costs": {"2019": "\u2013", "2018": -4}, "Less: -- Total post-employment benefit plans service cost": {"2019": -247, "2018": -270}}
capitalized_benefit_plans_cost_2019 = df["Less: -- Capitalized benefit plans cost"]["2019"]
capitalized_benefit_plans_cost_2018 = df["Less: -- Capitalized benefit plans cost"]["2018"]
answer = capitalized_benefit_plans_cost_2019 - capitalized_benefit_plans_cost_2018