What is the debts to assets ratio of the parent entity in 2018?
{"Assets -- Current Assets": {"2019 $000": 4297, "2018 $000": 7869}, "Assets -- Non-Current Assets": {"2019 $000": 165165, "2018 $000": 174810}, "Assets -- Total Assets": {"2019 $000": 169462, "2018 $000": 182679}, "Liabilities -- Current Liabilities": {"2019 $000": 92352, "2018 $000": 93067}, "Liabilities -- Total Liabilities": {"2019 $000": 92352, "2018 $000": 93067}, "Liabilities -- Net Assets": {"2019 $000": 77110, "2018 $000": 89612}, "Equity -- Contributed Equity": {"2019 $000": 111290, "2018 $000": 111066}, "Equity -- Reserves": {"2019 $000": 3960, "2018 $000": 3198}, "Equity -- Accumulated Losses": {"2019 $000": -38140, "2018 $000": -24652}, "Equity -- Total Equity": {"2019 $000": 77110, "2018 $000": 89612}, "Financial Performance -- Loss of the parent entity": {"2019 $000": -4812, "2018 $000": -163}, "Financial Performance -- Total comprehensive loss of the parent entity": {"2019 $000": -4812, "2018 $000": -163}}
liabilities_2018 = df["Liabilities -- Current Liabilities"]["2018 $000"]
assets_2018 = df["Assets -- Total Assets"]["2018 $000"]
answer = liabilities_2018 / assets_2018