What is the increase in net other tangible assets from 2018 to 2019?
{"Developed technologies, at cost": {"2019": 670.2, "2018": 578.5}, "Customer relationships, trade names, patents, and user lists, at cost (1)": {"2019": 533.1, "2018": 372.5}, "Other intangible assets, at cost (2)": {"2019": 1203.3, "2018": 951.0}, "Less: accumulated amortization": {"2019": -922.5, "2018": -895.8}, "Other intangible assets, net": {"2019": 280.8, "2018": 55.2}}
other_intangible_assets_net_2019 = df["Other intangible assets, net"]["2019"]
other_intangible_assets_net_2018 = df["Other intangible assets, net"]["2018"]
answer = other_intangible_assets_net_2019 - other_intangible_assets_net_2018