What is the change in the Compensation and related benefits from 2018 to 2019?
{"Compensation and related benefits": {"2019": 3247, "2018": 949}, "Professional and legal fees": {"2019": 242, "2018": 545}, "Totals ": {"2019": 3489, "2018": 1494}}
compensation_and_related_benefits_2019 = df["Compensation and related benefits"]["2019"]
compensation_and_related_benefits_2018 = df["Compensation and related benefits"]["2018"]
answer = compensation_and_related_benefits_2019 - compensation_and_related_benefits_2018