What is the increase/ (decrease) in Directors’ compensation from 2018 to 2019?
{"": {"2017": "NT$(In Thousands)", "2018": "NT$(In Thousands)", "2019": "NT$(In Thousands)"}, "Employees compensation  Cash": {"2017": 1032324, "2018": 1400835, "2019": 1132952}, "Directors compensation": {"2017": 11452, "2018": 7624, "2019": 10259}}
directors_compensation_2019 = df["Directors compensation"]["2019"]
directors_compensation_2018 = df["Directors compensation"]["2018"]
answer = directors_compensation_2019 - directors_compensation_2018