What was the increase / (decrease) in the prepaid expenses and other assets from 2018 to 2019?
{"Assets -- Prepaid expenses and other": {"2019": 3481, "2018": 2921}, "Assets -- Other assets - net": {"2019": 2016, "2018": 2193}, "Assets -- Total": {"2019": 5497, "2018": 5114}}
assets_prepaid_expenses_2019 = df["Assets -- Prepaid expenses and other"]["2019"]
assets_prepaid_expenses_2018 = df["Assets -- Prepaid expenses and other"]["2018"]
answer = assets_prepaid_expenses_2019 - assets_prepaid_expenses_2018