Who was the Prime Minister of Niger in 2011?

Mahamadou Danda was the Prime Minister of Niger at the start of 2011.
Brigi Rafini became the Prime Minister of Niger on April 7.

Danda became the Prime Minister of Niger on 2010 February 23, and left office after the 2011 presidential election. 

Rafini became the Prime Minister of Niger at the same time Mahamadou Issoufou became President of Niger.

Mahamadou Danda was the Prime Minister of Niger at the start of 2011.
Brigi Rafini became the Prime Minister of Niger on April 7.

Danda became the Prime Minister of Niger on 2010 February 23, and left office after the 2011 presidential election. 

Rafini became the Prime Minister of Niger at the same time Mahamadou Issoufou became President of Niger.