What was the change in Cash and cash equivalents between 2018 and 2019?
{"Cash and cash equivalents": {"2019": 195760, "2018": 303390, "2017": 224614}, "Restricted cash": {"2019": 250081, "2018": 155109, "2017": 129224}, "Cash and cash equivalents and restricted cash in Consolidated Statements of Cash Flows": {"2019": 445841, "2018": 458499, "2017": 353838}}
cash_and_cash_equivalents_2019 = df["Cash and cash equivalents"]["2019"]
cash_and_cash_equivalents_2018 = df["Cash and cash equivalents"]["2018"]
answer = cash_and_cash_equivalents_2019 - cash_and_cash_equivalents_2018