What was the change between the long-term debt 1-3 years and 3-5 years?
{"Long-term debt": {"Less than 1 Year": 18350, "1 -3 Years": 521700, "3 -5 Years": 1729663, "Thereafter": "$ \u2014", "Total": 2269713}, "Interest on long-term debt obligations (1)": {"Less than 1 Year": 128731, "1 -3 Years": 246834, "3 -5 Years": 65552, "Thereafter": "\u2014", "Total": 441117}, "Finance leases": {"Less than 1 Year": 10280, "1 -3 Years": 8285, "3 -5 Years": 3404, "Thereafter": 6604, "Total": 28573}, "Operating leases": {"Less than 1 Year": 7860, "1 -3 Years": 10751, "3 -5 Years": 5660, "Thereafter": 10691, "Total": 34962}, "Unconditional purchase obligations: -- Unrecorded (2)": {"Less than 1 Year": 36488, "1 -3 Years": 37830, "3 -5 Years": 19954, "Thereafter": 1371, "Total": 95643}, "Unconditional purchase obligations: -- Recorded (3)": {"Less than 1 Year": 98035, "1 -3 Years": "\u2014", "3 -5 Years": "\u2014", "Thereafter": "\u2014", "Total": 98035}, "Unconditional purchase obligations: -- Pension funding (4)": {"Less than 1 Year": 33861, "1 -3 Years": 64311, "3 -5 Years": 65959, "Thereafter": "\u2014", "Total": 164131}}
longterm_debt_3_5_years = df["Long-term debt"]["3 -5 Years"]
longterm_debt_1_3_years = df["Long-term debt"]["1 -3 Years"]
answer = longterm_debt_3_5_years - longterm_debt_1_3_years