What is the change in the Net cash provided by financing activities from 2018 to 2019?
{"Net cash provided by operating activities": {"2019": 116126, "2018": 140459}, "Net cash used in investing activities": {"2019": -301433, "2018": -537584}, "Net cash provided by financing activities": {"2019": 3954, "2018": 573000}}
net_cash_2019 = df["Net cash provided by financing activities"]["2019"]
net_cash_2018 = df["Net cash provided by financing activities"]["2018"]
answer = net_cash_2019 - net_cash_2018