What was the change in Additions to intangible assets between 2019 and 2020?
{"Balance, beginning of the year": {"January 31, 2020": 966, "February 1, 2019": 1059}, "Additions to intangible assets related to business combinations": {"January 31, 2020": 622, "February 1, 2019": 154}, "Amortization expense": {"January 31, 2020": -300, "February 1, 2019": -247}, "Derecognized leasehold interest": {"January 31, 2020": -116, "February 1, 2019": "\u2014"}, "Balance, end of the year": {"January 31, 2020": 1172, "February 1, 2019": 966}}
additions_2020 = df["Additions to intangible assets related to business combinations"]["January 31, 2020"]
additions_2019 = df["Additions to intangible assets related to business combinations"]["February 1, 2019"]
answer = additions_2020 - additions_2019