Simplify the following text for a Grade 10 native English-speaking person.
Original: On 5 April 2009 he succeeded Anders Fogh Rasmussen as Prime Minister following Anders Fogh Rasmussen 's appointment as Secretary General of NATO .
Simplified: On 5 April 2009 he took over from Anders Fogh Rasmussen as Prime Minister after Fogh Rasmussen was elected Secretary General of NATO .