Question:
Which employer did Khadija Arib work for in Sep, 1986?

Context:
 Khadija Arib works for Erasmus University Rotterdam from Jan, 1992 to Jan, 1995. 
 Khadija Arib works for Amsterdam from Jan, 1988 to Jan, 1998. 
 Khadija Arib works for Hogeschool van Amsterdam from Jan, 1987 to Jan, 1991. 
 Khadija Arib works for Ministry of Social Affairs and Employment from Jan, 1984 to Jan, 1987. 
 Khadija Arib works for Regional Institution for Ambulant Mental Health Care from Jan, 1982 to Jan, 1983.

Answer:
Ministry of Social Affairs and Employment