What was the difference between the aggregate intrinsic value between exercisable and vested and expected to vest options? 
{"Exercisable": {"Outstanding Options": 945.0, "Exercise Price": 47.24, "Weighted- Average Remaining Contractual Term (in years)": 3.81, "Aggregate Intrinsic Value(1)": 95.0}, "Vested and expected to vest": {"Outstanding Options": 2589.0, "Exercise Price": 56.13, "Weighted- Average Remaining Contractual Term (in years)": 6.41, "Aggregate Intrinsic Value(1)": 238.0}}
vested_intrinsic_value = df["Vested and expected to vest"]["Aggregate Intrinsic Value(1)"]
exercisable_intrinsic_value = df["Exercisable"]["Aggregate Intrinsic Value(1)"]
answer = vested_intrinsic_value - exercisable_intrinsic_value