Question:
Which position did Hans Fredrik Grøvan hold in Apr, 2016?

Context:
 Hans Fredrik Grøvan holds the position of Substitute member of the Parliamentary Assembly of the Council of Europe from Nov, 2013 to Nov, 2017. 
 Hans Fredrik Grøvan holds the position of mayor of Lyngdal from Jan, 1995 to Jan, 2007. 
 Hans Fredrik Grøvan holds the position of deputy member of the Parliament of Norway from Jan, 2009 to Jan, 2013. 
 Hans Fredrik Grøvan holds the position of member of the Parliament of Norway from Oct, 2017 to Sep, 2021.

Answer:
Substitute member of the Parliamentary Assembly of the Council of Europe