What was the change in the Beginning balance from 2018 to 2019?
{"": {"2019": "(in thousands)", "2018": ""}, "Beginning balance": {"2019": 238330, "2018": 237992}, "Adjustments": {"2019": "\u2014", "2018": 338}, "Ending balance": {"2019": 238330, "2018": 238330}}
beginning_balance_2019 = df["Beginning balance"]["2019"]
beginning_balance_2018 = df["Beginning balance"]["2018"]
answer = beginning_balance_2019 - beginning_balance_2018